:author: The KiCad Team
:doctype: book
:toc:
:ascii-ids:
:experimental:

= KiCad

_Reference manual_

[[copyright]]
*Copyright*

This document is Copyright (C) 2010-2024 by its contributors as listed below. You may distribute it
and/or modify it under the terms of either the GNU General Public License
(http://www.gnu.org/licenses/gpl.html), version 3 or later, or the Creative Commons Attribution
License (http://creativecommons.org/licenses/by/3.0/), version 3.0 or later.

All trademarks within this guide belong to their legitimate owners.

[[contributors]]
*Contributors*

Jean-Pierre Charras, Fabrizio Tappero, Jon Evans.

[[feedback]]
*Feedback*

The KiCad project welcomes feedback, bug reports, and suggestions related to the software or its
documentation.  For more information on how to sumbit feedback or report an issue, please see the
instructions at https://www.kicad.org/help/report-an-issue/

== Introduction

KiCad is an open-source software suite for creating electronic circuit schematics and printed
circuit boards (PCBs).  KiCad supports an integrated design workflow in which a schematic and
corresponding PCB are designed together, as well as standalone workflows for special uses.  KiCad
also includes several utilities to help with circuit and PCB design, including a PCB calculator for
determining electrical properties of circuit structures, a Gerber viewer for inspecting 
manufacturing files, and an integrated SPICE simulator for inspecting circuit behavior.

KiCad runs on all major operating systems and a wide range of computer hardware.  It supports PCBs
with up to 32 copper layers and is suitable for creating designs of all complexities.  KiCad is
developed by a volunteer team of software and electrical engineers around the world with a mission
of creating free and open-source electronics design software suitable for professional designers.

The latest version of this documentation is available at https://docs.kicad.org. 

=== System Requirements

KiCad is capable of running on a wide variety of hardware and operating systems, but some tasks
may be slower or more difficult on lower-end hardware.  For the best experience, a dedicated
graphics card and display with 1920x1080 or higher resolution is recommended.

Please check the KiCad website for the latest system requirements:
https://kicad.org/help/system-requirements/

=== KiCad files and folders

KiCad creates and uses files with the following specific file extensions (and folders)
for schematic and board editing.

==== Project files
[width="100%",cols="20%,80%",]
|=================================================================
|`*.kicad_pro` |Project file, containing settings that are shared between the schematic and PCB
|`*.pro` |Legacy (KiCad 5.x and earlier) project file.
Can be read and will be converted to a `.kicad_pro` file by the project manager.
|=================================================================

==== Schematic editor files
[width="100%",cols="20%,80%",]
|=================================================================
|`*.kicad_sch` |Schematic files containing all info and the components themselves.
|`*.kicad_sym` |Schematic symbol library file, containing the component descriptions: graphic shape, pins, fields.
|`*.sch` |Legacy (KiCad 5.x and earlier) schematic file.
Can be read and will be converted to a `.kicad_sch` file on write.
|`*.lib` |Legacy (KiCad 5.x and earlier) schematic library file. Can be read but not written.
|`*.dcm` |Legacy (KiCad 5.x and earlier) schematic library documentation. Can be read but not written.
|`*-cache.lib` |Legacy (KiCad 5.x and earlier) schematic component library cache file.
Required for proper loading of a legacy schematic (`.sch`) file.
|`sym-lib-table` |Symbol library table:
list of symbol libraries available in the schematic editor.
|=================================================================

==== Board editor files and folders
[width="100%",cols="20%,80%",]
|=================================================================
|`*.kicad_pcb` |Board file containing all info but the page layout.
|`*.pretty` |Footprint library folders. The folder itself is the library.
|`*.kicad_mod` |Footprint files, containing one footprint description each.
|`*.kicad_dru` |Design rules file, containing custom design rules for a certain `.kicad_pcb` file.
|`*.brd` |Legacy (KiCad 4.x and earlier) board file.
Can be read, but not written, by the current board editor.
|`*.mod` |Legacy (KiCad 4.x and earlier) footprint library file.
Can be read by the footprint or the board editor, but not written.
|`fp-lib-table` |Footprint library table: 
list of footprint libraries available in the board editor.
|`fp-info-cache` |Cache to speed up loading of footprint libraries. Does not need to be distributed with the project or put under version control.
|=================================================================

==== Common files
[width="100%",cols="20%,80%",]
|=================================================================
|`*.kicad_prl` |Local settings for the current project; helps KiCad remember
the last used settings such as layer visibility or selection filter.
May not need to be distributed with the project or put under version control.
|`*.kicad_wks` |Page layout (drawing border and title block) description file
|`*.net` |Netlist file created from the schematic, and read by the board editor.
Note that the
xref:../pcbnew/pcbnew_editing.adoc#forward-and-back-annotation[recommended
workflow for transferring information from the schematic to the board] does not
require the use of netlist files.
|`*.cmp` |Association between components used in the schematic and their footprints.
It can be created by the Board Editor and imported by the Schematic Editor.
Its purpose is to import changes from the board to the schematic, for users
who change footprints in the Board Editor (for instance using **Exchange
Footprints** command) and want to import these changes back to the schematic.
xref:../pcbnew/pcbnew_editing.adoc#forward-and-back-annotation[recommended
workflow for transferring information from the board to the schematic] does not
require the use of `.cmp` files.
|=================================================================


==== Fabrication and documentation files
[width="100%",cols="20%,80%",]
|=================================================================
|`*.gbr` |Gerber files, for fabrication.
|`*.drl` |Drill files (Excellon format), for fabrication.
|`*.pos` |Position files (ASCII format), for automatic insertion machines.
|`*.rpt` |Report files (ASCII format), for documentation.
|`*.ps`  |Plot files (Postscript), for documentation.
|`*.pdf` |Plot files (PDF format), for documentation.
|`*.svg` |Plot files (SVG format), for documentation.
|`*.dxf` |Plot files (DXF format), for documentation.
|`*.plt` |Plot files (HPGL format), for documentation.
|=================================================================

==== Storing and sending KiCad files

KiCad schematic and board files contain all the schematic symbols and footprints used in the
design, so you can back up or send these files by themselves with no issue.  Some important
design information is stored in the project file (`.kicad_pro`), so if you are sending a complete
design, make sure to include it.

Some files, such as the project-local settings file (`.kicad_prl`) and the `fp-info-cache` file,
are not necessary to send with your project.  If you use a version control system such as Git to
keep track of your KiCad projects, you may want to add these files to the list of ignored files so
that they are not tracked.


== Installing and Upgrading KiCad

[[settings]]
=== Importing settings

Each major release of KiCad has its own configuration, so that you may run multiple KiCad versions
on the same computer without the configurations interfering.  The first time you run a new version
of KiCad, you will be asked how to initialize the settings:

image::images/configure_settings.png[]

If a previous version of KiCad is detected, you will have the option to import the settings from
that version.  The location of the previous configuration files is detected automatically, but you
may override it to choose another location if desired.

Please note that, the schematic symbol and footprint library tables from the previous version of
KiCad will **not** be imported.

You may also choose to start with default settings if you do not want to import settings from a
previous version.

[[config-file-location]]
KiCad stores the settings files in a folder inside your user directory.  Each KiCad version will
store its settings in a subfolder of that folder (except for KiCad 5.1 and earlier, which did not
use subfolders).  Those folders are:

[width="75%",cols="25%,75%"]
|===========================
|Windows |`%APPDATA%\kicad`
|Linux   |`~/.config/kicad`
|macOS  |`/Users/<username>/Library/Preferences/kicad`
|===========================

=== Migrating files from previous versions

Modern versions of KiCad can open files created in earlier versions, but can only write files in
the latest formats.  This means that in general, there are no special steps to migrate files from
a previous version besides opening the files.  In some cases, the file extension for a file has
changed from one KiCad version to the next.  After opening these files, they will be saved in the
new format with the new file extension.  The old files will not be deleted automatically.

The schematic editor documentation describes several particular considerations
for opening
xref:../eeschema/eeschema_schematic_creation_and_editing.adoc#opening-legacy-schematics[legacy schematics].

In general, files created or modified by one version of KiCad **cannot** be opened by older
versions of KiCad.  For this reason, it is important to keep backup copies of your projects when
testing a new KiCad release, until you are confident that you will not need to use the older
KiCad version anymore.

NOTE: Hotkey configurations are not imported from previous versions at this time.  You can manually
      import hotkey configurations by copying the various `*.hotkeys` files from the old version
      configuration directory to the new one.  If you do so, please note that KiCad will not
      automatically detect conflicts such as one key being assigned to multiple actions.


== Using KiCad project manager

KiCad project manager (kicad or kicad.exe) is a tool which can easily run the other tools
(schematic and board editors, Gerber viewer and utility tools) when creating a design.

Running the other tools from KiCad manager has some advantages:

* cross probing between schematic editor and board editor.

* synchronization of the design between the schematic editor and board editor (without creating
  netlist files)

KiCad currently only supports having one project open at a time.  When running the schematic and
board editors from the KiCad project manager, you can only edit the schematics and board associated
with the open project.  When these tools are run in _standalone_ mode, you can open any file in
any project, but cross probing between tools can give strange results.

=== Project manager window

image::images/main_window.png[scaledwidth="90%"]

The KiCad project manager window is composed of a tree view on the left showing the files
associated with the open project, and a launcher on the right containing shortcuts to the various
editors and tools.

=== Project tree view

The tree view shows a list of files inside the project folder.  Double-clicking on a file in the
tree view will open it in the associated editor.  Right-clicking on a file will open a context
menu with some file manipulation commands.

image::images/project_tree.png[scaledwidth="35%"]

NOTE: Only files that KiCad understands how to open are displayed in the project tree view.

=== Side toolbar

The toolbar on the left side of the window provides shortcuts for common project operations:

[width="100%",cols="10%,90%",]
|=======================================================================
|image:images/icons/new_project_24.png[]
|Create a new project.
|image:images/icons/open_project_24.png[]
|Open an existing project.
|image:images/icons/zip_24.png[]
|Create a zip archive of the whole project. This includes schematic
files, libraries, PCB, etc.
|image:images/icons/unzip_24.png[]
|Extract a project zip archive into a directory. Files in the destination
directory will be overwritten.
|image:images/icons/reload_24.png[]
|Refresh the tree view, to detect changes made on the filesystem.
|image:images/icons/directory_browser_24.png[]
|Open the project working directory in a file explorer.
|=======================================================================

=== Creating a new project

Most KiCad designs start with the creation of a project.  There are two ways to create a project
from the KiCad project manager: you may create an empty project, or create a project based on an
existing template.  This section will cover the creation of a new, empty project.  Creating
projects from templates is covered in the <<project-templates,Project Templates>> section.

To create a new project, use the **New Project...** command in the **File** menu, click the
**New Project** button in the top toolbar, or use the keyboard shortcut (`Ctrl+N` by default).

You will be prompted for a name to give your project.  By default, a directory will be created for
your project with the same name.  For example, if you enter the name `MyProject`, KiCad will create
the directory `MyProject` and the project file `MyProject/MyProject.kicad_pro` inside it.

If you already have a directory to store your project files in, you can uncheck the
_Create a new directory for the project_ checkbox in the **New Project** dialog.

NOTE: It is strongly recommended that you store each KiCad project inside its own directory.

Once you select the name of your project, KiCad will create the following files inside the project
directory:

[width="100%",cols="27%,73%",]
|=================================================================
|`example.kicad_pro` |KiCad project file.
|`example.kicad_sch` |Main schematic file.
|`example.kicad_pcb` |Printed circuit board file.
|=================================================================

=== Importing a project from another EDA tool

KiCad is able to import files created by some other software packages.  Some software formats can
be imported as complete projects.  Others can only be imported as standalone schematics or boards
at the moment, and must be manually linked together into a KiCad project. Currently the following
types of project are supported:

[width="100%",cols="27%,73%",]
|=============================================
|`\*.sch`, `*.brd` |Eagle 6.x or newer (XML format)
|`\*.csa`, `*.cpa` |CADSTAR archive format
|=============================================

To import a project from one of these tools, choose the appropriate option from the **Import
Non-KiCad Project** submenu of the **File** menu.

You will be prompted to select either a schematic or a board file in the import file browser
dialog. The imported schematic and board files should have the same base file name (e.g.
project.sch and project.brd). Once the requested files are selected, you will be asked to select a
directory to store the resulting KiCad project.

Currently the following types of documents can be imported standalone.  To import these documents,
start the KiCad Schematic Editor or PCB Editor standalone (do not open the KiCad project manager
first) and choose **File > Import > Non-KiCad Schematic** or
**File > Import > Non-KiCad Board File**.  When importing Altium projects, we recommend importing
the PCB first, saving the resulting project, and then copying each schematic sheet into the project
after importing it in a standalone Schematic Editor window.

[width="100%",cols="27%,73%",]
|=============================================
|`*.SchDoc` |Altium Designer, Circuit Studio, Circuit Maker schematic documents
|`*.PcbDoc` |Altium Designer PCB
|`*.CMPcbDoc` |Altium Circuit Maker PCB
|`*.CSPcbDoc` |Altium Circuit Studio PCB
|`*.pcb` |P-Cad 200x ASCII PCB
|`\*.txt`, `*.fab` |Fabmaster PCB
|=============================================

NOTE: KiCad does not support schematics with multiple top-level sheets.  When importing designs
from other tools that do support this feature, each schematic sheet must be imported, and then the
imported sheets must be placed as hierarchical sheets in a new KiCad project.

[[project-archive]]
=== Saving and loading project archives

You can archive your project's files into a zip archive with the Archive tool
(**File** -> **Archive Project...**).

You can also unarchive a project using the Unarchive tool (**File** ->
**Unarchive Project...**). When you unarchive a project into the currently
loaded project directory, the project will be reloaded automatically to reflect
any changes that were in the archived version of the project.

The archive tool saves the following files from your project folder into the
archive:

[width="100%",cols="40%,60%",]
|=================================================================
|`\*.kicad_prl`, `*.kicad_pro`,
      `\*.kicad_sch`, `*.kicad_sym`,
      `\*.kicad_pcb`, `*.kicad_mod`,
      `\*.kicad_dru`, `*.kicad_wks`,
      `\*.wbk`, `*.fp-lib-table`, `*.sym-lib-table`
      | KiCad design files
|`\*.pro`, `*.sch`,
      `\*.lib`, `*.dcm`, `\*.cmp`, `*.brd`, `*.mod`
      | Legacy KiCad design files
|`\*.stp`, `*.step`
      | 3D models
|`\*.g?`, `*.g??`,
      `\*.gm??`, `*.gbrjob`
      | Gerber files
|`\*.pos`, `*.drl`, `\*.nc`, `*.xnc`, `\*.d356`, `*.rpt`
      | Manufacturing files
|`*.net`
      | Netlists
|`*.py`
      | Python scripts
|`\*.pdf`, `*.txt`
      | Documentation files
|`\*.cir`, `*.sub`, `*.model`
      | SPICE models
|`\*.ibs`, `*.pkg`
      | IBIS models
|=================================================================


[[kicad-manager-configuration]]
== KiCad configuration

The KiCad preferences can always be accessed from the **Preferences** menu, or by using the hotkey
(default kbd:[Ctrl+,]). The Preferences dialog is shared between the running KiCad tools.  Some
preferences apply to all tools, and some are specific to a certain tool (such as the schematic or
board editor).

=== Common preferences

image::images/preferences_common.png[width="100%"]

**Accelerated graphics antialising:** KiCad can use different methods to prevent aliasing
(jagged lines) when rendering using a graphics card.  Different methods may look better on
different hardware, so you may want to experiment to find the one that looks best to you.

**Fallback graphics antialiasing:** KiCad can also apply antialiasing when using the fallback
graphics mode.  Enabling this feature may result in poor performance on some hardware.

**Text editor:** Choose a text editor to use when opening text files from the project tree view.

**PDF viewer:** Choose a program to use when opening PDF files.

**Show icons in menus:** Enables icons in drop-down menus throughout the KiCad user interface.

NOTE: Icons in menus are not displayed on some operating systems.

**Show scrollbars in editors:** When enabled, scrollbars are displayed next to the editing
canvases in each tool. When disabled, scrollbars are not shown.

**Focus follows mouse between schematic and PCB editors:** When enabled, the window under the
mouse cursor will automatically become focused.

**Icon scale:** Sets the size of the icons used in menus and buttons throughout KiCad.  Choose
_Automatic_ to pick an appropriate icon scale automatically based on your operating system
settings.

**Icon theme:** Sets whether to use the icon theme designed for light window backgrounds or dark
window backgrounds.  The default setting of Automatic will choose the theme based on the lightness
of the operating system window theme.

**High-contrast mode dimming factor:** Sets how much non-focused items are
dimmed in high-contrast display mode.

**Warp mouse to origin of moved object:** When enabled, the mouse cursor will be repositioned
(warped) to the origin of an object when you start a move command on that object.

**First hotkey selects tool:** When disabled, pressing the hotkey for a command such as _Add Wire_
will immediately start the command at the current cursor location.  When enabled, pressing the
hotkey the first time will just select the _Add Wire_ tool but will not immediately begin a wire.

**Remember open files for next project launch:** When enabled, KiCad will automatically re-open any
files that were previously open when a project is re-opened.

**Auto save:** When editing schematics and board files, KiCad can automatically save your work
periodically.  Set to `0` to disable this feature.

**File history size:** Configure the number of entries in the list of recently-opened files

**3D cache file duration:** KiCad creates a cache of 3D models in order to speed up the 3D viewer.
You can configure how long to keep this cache before deleting old files.

**Automatically backup projects:** When enabled, KiCad projects will be archived to ZIP files
automatically according to the settings below.  The archives will be stored in a subfolder of the
project folder.  Backups are created when saving files in the project.

**Create backups when auto save occurs:** When enabled, a backup will be created every time an
automatic file save occurs (if the backup is permitted by the settings below).  This setting has
no effect if the auto save interval is set to `0` (disabled).

**Maximum backups to keep:** When creating a new backup, the oldest backup file will be deleted to
keep the total number of backup files below this limit.

**Maximum backups per day:** When creating a new backup, the oldest backup file created on the
current day will be deleted to stay below this limit.

**Minimum time between backups:** If backup is triggered (for example, by saving a board file),
the backup will not be created if an existing backup file is newer than this limit.

**Maximum total backup size:** When creating a new backup file, the oldest backup files will be
deleted to keep the total size of the backup files directory below this limit.

=== Mouse and touchpad preferences

image::images/preferences_mouse_and_touchpad.png[width="100%"]

**Center and warp cursor on zoom:** When enabled, zooming using the hotkeys or mouse wheel will
cause the view to be centered on the cursor location.

**Use zoom acceleration:** When enabled, scrolling the mouse wheel or touchpad faster will cause
the zoom to change faster.

**Zoom speed:** Controls how much the zoom changes for a given amount of scrolling the mouse wheel
or touchpad.  Use _Automatic_ to set a default value depending on your operating system.

**Automatically pan while moving object:** When enabled, the view can be panned while moving an
object by moving close to the edge of the canvas.

**Auto pan speed:** Controls how fast the canvas pans while moving an object.

**Mouse buttons:** You can set the behavior of dragging the middle and right mouse buttons to zoom
the view, pan the view, or have no effect.  You can also set the behavior of dragging the left
mouse button depending on whether or not any objects are already selected in the editing canvas.

NOTE: The left mouse button is always used for selecting and manipulating objects.

**Mouse wheel and touchpad scrolling:** You can set the behavior of scrolling the mouse wheel or
vertical motion of the touchpad while pressing certain modifier keys.

**Pan left/right with horizontal movement:** When enabled, you can pan the view using the touchpad
or horizontal scroll wheel (if present on your mouse).

=== Hotkey preferences

image::images/preferences_hotkeys.png[width="100%"]

You can use this dialog to customize the hotkeys used to control KiCad.  The hotkeys in the
_Common_ section are shared between every KiCad program. Hotkeys for each specific KiCad program
are shown when that program is running.  You can assign the same hotkey to a different action in
different KiCad programs (for example, the schematic editor and the board editor), but you cannot
assign a hotkey to more than one action in the same program.

There are many available commands, and so not all of them have a hotkey assigned by default.  You
can add a hotkey to any command by double-clicking on the command in the list.  If you choose a
hotkey that is already assigned to a different command, you can choose to use that hotkey on your
chosen command, which will remove the hotkey assignment from the conflicting command.

Changes that you have made to hotkey assignments are shown with a `*` character at the end of the
command name.  You can undo changes to a specific command by right-clicking that command and
selecting **Undo Changes**, or you can undo all changes with the button below the command list.

**Importing hotkeys**

Hotkey preferences are stored in `.hotkeys` files in the KiCad settings directory (see the
<<settings,Settings>> section for information about where the settings directory is on your
operating system).  If you have configured KiCad hotkeys the way you like on one computer, you can
transfer that configuration to another computer by importing the appropriate `.hotkeys` file(s).

=== Paths configuration

In KiCad, one can define paths using an *environment variable*.
A few environment variables are internally defined by KiCad,
and can be used to define paths for libraries, 3D shapes, etc.

This is useful when absolute paths are not known or are subject to change (e.g.
when you transfer a project to a different computer), and also when one base
path is shared by many similar items. Consider the following which may be
installed in varying locations:

* Schematic symbol libraries
* Footprint libraries
* 3D model files used in footprint definitions

For instance, the path to the `connect.pretty` footprint library,
when using the `KICAD8_FOOTPRINT_DIR` environment variable, would be defined as
`$\{KICAD8_FOOTPRINT_DIR\}/connect.pretty`.

The *Preferences* -> *Configure Paths...* menu
allows you to define paths for some built-in KiCad environment variables,
and add your own environment variables to define personal paths, if needed.

NOTE: KiCad will automatically resolve versioned environment variables from
      older versions of KiCad to the value of the corresponding variable from
      the current KiCad version, as long as the old variable is not explicitly
      defined itself. For example, `$\{KICAD7_FOOTPRINT_DIR\}` will
      automatically resolve to the value of `$\{KICAD8_FOOTPRINT_DIR\}` if there
      is no `KICAD7_FOOTPRINT_DIR` variable defined.

[[kicad-environment-variables]]
==== KiCad environment variables

[width="100%",cols="30%,70%",]
|=================================================================
|`KICAD8_3DMODEL_DIR`
  |Base path of KiCad's standard 3D footprint model library
  files.
|`KICAD8_3RD_PARTY`
  |Location for plugins, libraries, and color themes installed by the
  <<plugin-content-manager,Plugin and Content Manager>>.
|`KICAD8_FOOTPRINT_DIR` |Base path of KiCad's standard footprint library files.
|`KICAD8_SYMBOL_DIR` |Base path of KiCad's standard symbol library files.
|`KICAD8_TEMPLATE_DIR` |Location of KiCad's standard project template library files.
|`KICAD_USER_TEMPLATE_DIR` |Location of personal project templates.
|`SPICE_LIB_DIR`
  |Location of personal xref:../eeschema/eeschema.adoc#sim-library[simulation model libraries].
  This variable is not defined by default.
|`KIPRJMOD`
  |Absolute path to the current project directory. This variable is set
  automatically and cannot be redefined.
|=================================================================

image::images/configure_path_dlg.png[scaledwidth="80%"]

Paths set in the Configure Paths dialog are internal to KiCad and are not
visible as environment variables outside of KiCad. They are stored in <<config-file-location,KiCad's user
configuration files>>.

Paths can also be set as environment variables outside of KiCad, which will
override any settings in the user's configuration.

NOTE: You cannot override an environment
      variable that has been set outside of KiCad by using the Configure Paths dialog.
      Any variable that has been set externally will be shown as read-only in the
      dialog.

Note also that the environment variable `KIPRJMOD` is *always* internally
defined by KiCad, and expands to the **current project absolute path**.
For instance, `$\{KIPRJMOD\}/connect.pretty` is always the `connect.pretty`
folder (the footprint library) inside **the current project folder**.
The `KIPRJMOD` variable cannot be changed in the Configure Paths dialog or
overridden by an external environment variable.

==== Advanced environment variables

Some advanced environment variables can be set to customize KiCad's behavior.
These variables are not shown in the environment variable configuration and
cannot be used in path substitutions. They cannot be modified in the Configure
Paths dialog, but they can be overridden by system environment variables.

Changing these variables will not result in KiCad moving any files from the
default location to the new location, so if you change these variables you will
need to copy any desired settings or files manually.

*Additional environment variables:*
[width="100%",cols="30%,70%",]
|=================================================================
|`KICAD_CONFIG_HOME` |Base path of KiCad configuration files. Subdirectories will be created
    within this directory for each KiCad minor version.
|`KICAD_DOCUMENTS_HOME` |Base path of KiCad user-modifiable documents, such as projects, templates,
    Python scripts, libraries, etc. Subdirectories will be created within this directory for each
    KiCad minor version. This directory is provided as a suggested user data location, but does
    not need to be used.
|=================================================================


WARNING: If you modify the configuration of paths, please quit and restart KiCad
to avoid any issues in path handling.

[[libraries-configuration]]
=== Libraries configuration

The *Preferences* -> *Manage Symbol Libraries...* menu lets you manage the
list of symbol libraries
(xref:../eeschema/eeschema_symbols_and_libraries.adoc#managing-symbol-libraries[symbol library table]).

Likewise, use the *Preferences* -> *Manage Footprint Libraries...* menu to manage
the list of footprint libraries
(xref:../pcbnew/pcbnew_footprints_and_libraries.adoc#managing-footprint-libraries[footprint library table]).

For each type of library (symbol and footprint), there are 2 library tables:
global and project specific. The global library table is located in the
<<config-file-location,user configuration directory>> and contains a list of
libraries available to all projects. The project-specific library table is
optional and contains a list of libraries specific to the project. It is located
in the project directory.


[[project-templates]]
== Project templates

Using a project template facilitates setting up a new project with predefined
settings. Templates may contain pre-defined board outlines, connector
positions, schematic elements, design rules, etc. Complete schematics and/or
PCBs used as seed files for the new project may even be included.

=== Using templates

The **File** -> **New Project from Template** menu will
open the Project Template Selector dialog:

A single click on a template's icon will display the template information,
and a further click on the OK button creates the new project. The template
files will be copied to the new project location and renamed to reflect
the new project's name.

image::images/template_selected.png[scaledwidth="80%"]

[[template-locations]]
=== Template locations

KiCad looks for system templates in the path defined in the
`KICAD8_TEMPLATE_DIR` path variable, and user templates in the path defined in
`KICAD_USER_TEMPLATE_DIR`. However, you can browse for templates in an arbitrary
directory using the **Folder** control at the top of the dialog.

=== Creating templates

A KiCad template is simply a directory containing the template project files,
as well as some required metadata for the template in a subdirectory named
`meta`. The name of the directory containing the template files determines the
name of the template. When you create a project from a template, KiCad copies
the template files to the new project directory, renaming them to match the new
project name as described below.

All files in the template are copied, with two exceptions:

* Files with names beginning with the `.` character (dotfiles) are not copied.
  There is a special case for files named `.gitignore` or `.gitattributes`,
  which are copied if they exist.
* The `meta` directory is not copied

The `meta` directory must contain an HTML file named `info.html`, which is
displayed in the KiCad template browser and should contain basic information
describing the template. Basic HTML features are supported, including images.
Any images referenced by `info.html` should also be stored in the `meta`
directory.

The `<title>` tag determines the name of the template that is displayed during
template selection. Note that the project template name will be cut off if it's
too long. This display name does not need to be the same as the template
directory name.

Here is a sample `info.html` file:

[source,html]
----------------------------------------------------------------
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<META HTTP-EQUIV="CONTENT-TYPE" CONTENT="text/html;
charset=windows-1252">
<TITLE>Raspberry Pi - Expansion Board</TITLE>
</HEAD>
<BODY LANG="fr-FR" DIR="LTR">
<P>This project template is the basis of an expansion board for the
<A HREF="http://www.raspberrypi.org/" TARGET="blank">Raspberry Pi $25
ARM board.</A> <BR><BR>This base project includes a PCB edge defined
as the same size as the Raspberry-Pi PCB with the connectors placed
correctly to align the two boards. All IO present on the Raspberry-Pi
board is connected to the project through the 0.1&quot; expansion
headers. <BR><BR>The board outline looks like the following:
</P>
<P><IMG SRC="brd.png" NAME="brd" ALIGN=BOTTOM WIDTH=680 HEIGHT=378
BORDER=0><BR><BR><BR><BR>
</P>
<P>(c)2012 Brian Sidebotham<BR>(c)2012 KiCad Developers</P>
</BODY>
</HTML>
----------------------------------------------------------------

Finally, `meta` can optionally contain an image named `icon.png`, which will be
used as the template's icon in the template selection dialog. The icon should be
a 64 x 64 pixel PNG image.

==== Template file renaming

All files and directories in a template are copied to the new project
path when a project is created using a template, except `meta` and any dotfiles.
Files and directories containing the template directory name will be renamed
with the new project file name.

For example, using a template named `example` (left) to create a project named
`newproject` (right), with renamed files shown in *bold*:

[width="100%",cols="50%,50%",options="header"]
|=======================================================================
|Files in template `example` directory
|Files created in project `newproject` directory
|
`example.kicad_pro` +
`example.kicad_sch` +
`example.kicad_pcb` +
`example-first.kicad_sch` +
`second-example.kicad_sch` +
`third.kicad_sch` +
`third.kicad_pcb`
|
`*newproject.kicad_pro*` +
`*newproject.kicad_sch*` +
`*newproject.kicad_pcb*` +
`*newproject-first.kicad_sch*` +
`*second-newproject.kicad_sch*` +
`third.kicad_sch` +
`third.kicad_pcb`
|=======================================================================

A template does not need to contain a complete project. If a required
project file is missing, KiCad will create the file using the default create
project behavior:

[width="100%",cols="50%,50%",options="header"]
|=======================================================================
|Files in template `example` directory
|Files created in `newproject` directory
|
`example.kicad_sch` +
`first-example.kicad_sch` +
`first-example.kicad_pcb` +
`second-example.kicad_sch` +
`second-example.kicad_pcb`
|
`*newproject.kicad_sch*` +
`*first-newproject.kicad_sch*` +
`*first-newproject.kicad_pcb*` +
`*second-newproject.kicad_sch*` +
`*second-newproject.kicad_pcb*` +
`*newproject.kicad_pro*` (default) +
`*newproject.kicad_pcb*` (default)
|=======================================================================

As an exception to the template name renaming rule, if the template contains
one project file (`.kicad_pro`) and its name doesn't match the template name,
KiCad will do the renaming based on that project file name instead:

[width="100%",cols="50%,50%",options="header"]
|=======================================================================
|Files in template `example` directory
|Files created in `newproject` directory
|
`example.kicad_sch` +
`example.kicad_pcb` +
`*first-example.kicad_pro*` +
`first-example.kicad_sch` +
`first-example.kicad_pcb` +
`second-example.kicad_sch` +
`second-example.kicad_pcb`
|
`example.kicad_sch` +
`example.kicad_pcb` +
`*newproject.kicad_pro*` +
`*newproject.kicad_sch*` +
`*newproject.kicad_pcb*` +
`second-example.kicad_sch` +
`second-example.kicad_pcb`
|=======================================================================

NOTE: It is not recommended to create a template with multiple project files.

[[plugin-content-manager]]
== Plugin and Content Manager

NOTE: This section of the KiCad documentation has not yet been written.  We
      appreciate your patience as our small team of volunteer documentation
      writers work to update and expand the documentation.

// actions reference (section header in included file)
include::kicad_projmgr_actions_reference.adoc[po4a]
