Update readme

1 files changed, 18 insertions, 7 deletions

diff --git a/README.md b/README.md
index b0a5a18..1adb7fb 100644
--- a/README.md
+++ b/README.md
@@ -6,18 +6,28 @@ functionality in Normal mode.
 
 The `master` branch provides a pair of common mappings for the Western and
 Eastern dialects that cover the full alphabet and all standard punctuation
-marks. The `alt` branch provides an alternate set of mappings based on the
-xkeyboard-config Armenian keymaps.
+marks. These are included in the [Vim source code][]. The `alt` branch provides
+an alternate set of mappings based on the xkeyboard-config Armenian keymaps.
 
 Please feel free to submit additional keymaps or corrections as pull requests
 or patches sent to <vim@benlinskey.com>.
 
 ## Setup
 
-Copy or link a keymap file to the directory `/usr/share/vim/vim74/keymap/`,
-then enable the keymap in your `.vimrc` using the `keymap` option.
+### Installing the keymap files
 
-For example, to use the Western Armenian keymap, copy or link
+The keymaps on the `master` branch are included with Vim, so you can skip ahead
+to [Activaing a keymap](#activating-a-keymap) if you’re using a newer version
+of Vim and you don’t need one of the alternate keymaps from the `alt` branch.
+
+If the keymap file you want to use isn’t installed on your system, copy or link
+the file to your Vim keymap directory (`/usr/share/vim/vim74/keymap` by default
+in Vim 7.4).
+
+### Activating a keymap
+
+To use a keymap, you’ll need to enable it in your `.vimrc` using the `keymap`
+option. For example, to use the Western Armenian keymap, copy or link
 `armenian-western_utf-8.vim` to the directory `/usr/share/vim/vim74/keymap/`,
 then enable the keymap in your `.vimrc`:
 
@@ -26,8 +36,8 @@ set keymap=armenian-western_utf-8
 ```
 
 You can switch between Armenian and Latin characters in Insert mode using
-<kbd>Ctrl-^</kbd>. To disable the keymap at Vim startup, add the following
-lines to your `.vimrc`:
+<kbd>Ctrl-^</kbd>. To disable the keymap at Vim startup so that Insert mode
+uses Latin characters by default, add the following lines to your `.vimrc`:
 
 ```vim
 set iminsert=0
@@ -54,4 +64,5 @@ en.wikipedia to Commons.) [[CC BY-SA 3.0][]],
 en.wikipedia to Commons.) [[CC BY-SA 3.0][]],
 [via Wikimedia Commons](https://commons.wikimedia.org/wiki/File%3AKB_Western_Armenian.svg).*
 
+[Vim source code]: https://github.com/vim/vim
 [CC BY-SA 3.0]: http://creativecommons.org/licenses/by-sa/3.0