X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=docs%2Ffeature_layouts.md;h=b34fd442d5c2f92d0ac460355591ecf894dab84e;hb=d686c0ea43d6a9db7768da64ee54c3ba25c018f7;hp=24c42c09feb1867f0cd885adba47035c4217c843;hpb=bb53635f33c213e5a940edea8b07026ef89aed42;p=qmk_firmware.git

diff --git a/docs/feature_layouts.md b/docs/feature_layouts.md
index 24c42c09f..b34fd442d 100644
--- a/docs/feature_layouts.md
+++ b/docs/feature_layouts.md
@@ -35,10 +35,12 @@ New names should try to stick to the standards set by existing layouts, and can
 
 ## Supporting a Layout
 
-For a keyboard to support a layout, the variable (`[a-z0-9_]`) must be defined in it's `<keyboard>.h`, and match the number of arguments/keys (and preferably the physical layout):
+For a keyboard to support a layout, the variable must be defined in it's `<keyboard>.h`, and match the number of arguments/keys (and preferably the physical layout):
 
     #define LAYOUT_60_ansi KEYMAP_ANSI
 
+The name of the layout must match this regex: `[a-z0-9_]+`
+
 The folder name must be added to the keyboard's `rules.mk`:
 
     LAYOUTS = 60_ansi
@@ -49,8 +51,39 @@ The folder name must be added to the keyboard's `rules.mk`:
 
 but the `LAYOUT_<layout>` variable must be defined in `<folder>.h` as well.
 
+## Building a Keymap
+
+You should be able to build the keyboard keymap with a command in this format:
+
+    make <keyboard>:<layout>
+
+### Conflicting layouts
+When a keyboard supports multiple layout options,
+
+    LAYOUTS = ortho_4x4 ortho_4x12
+
+And a layout exists for both options,
+```
+layouts/
++ community/
+| + ortho_4x4/
+| | + <layout>/
+| | | + ...
+| + ortho_4x12/
+| | + <layout>/
+| | | + ...
+| + ...
+```
+
+The FORCE_LAYOUT argument can be used to specify which layout to build
+
+    make <keyboard>:<layout> FORCE_LAYOUT=ortho_4x4
+    make <keyboard>:<layout> FORCE_LAYOUT=ortho_4x12
+
 ## Tips for Making Layouts Keyboard-Agnostic
 
+### Includes
+
 Instead of using `#include "planck.h"`, you can use this line to include whatever `<keyboard>.h` (`<folder>.h` should not be included here) file that is being compiled:
 
     #include QMK_KEYBOARD_H
@@ -70,3 +103,7 @@ For example:
 ```
 
 Note that the names are lowercase and match the folder/file names for the keyboard/revision exactly.
+
+### Keymaps
+
+In order to support both split and non-split keyboards with the same layout, you need to use the keyboard agnostic `LAYOUT_<layout name>` macro in your keymap. For instance, in order for a Let's Split and Planck to share the same layout file, you need to use `LAYOUT_ortho_4x12` instead of `LAYOUT_planck_grid` or just `{}` for a C array.