docs(mkdocs): add more info on whkdrc config

docs/example-configurations.md

@@ -177,7 +177,7 @@ If you like the `grid` layout in [LeftWM](https://github.com/leftwm/leftwm-layou
 
 `whkd` is a fairly basic piece of software with a simple configuration format:
 key bindings go to the left of the colon, and shell commands go to the right of the
-colon. By default, the `whkdrc` file should be located in the `$Env:USERPROFILE/.config/` directory.
+colon.
 
 Please remember that `whkd` does not support overriding Microsoft's limitations
 on hotkey bindings that include the `Windows` key. If this is important to you,
@@ -188,6 +188,25 @@ bindings for `komorebic` commands instead.
 {% include "./whkdrc.sample" %}
 ```
 
+### Configuration
+
+`whkd` searches for a `whkdrc` configuration file in the following locations:
+
+* `$Env:WHKD_CONFIG_HOME`
+* `$Env:USERPROFILE/.config`
+
+It is also possible to change a hotkey behavior depending on which application has focus:
+
+```
+alt + n [
+    # ProcessName as shown by `Get-Process`
+    Firefox       : echo "hello firefox"
+    
+    # Spaces are fine, no quotes required
+    Google Chrome : echo "hello chrome"
+]
+```
+
 ### Setting .shell
 
 There is one special directive at the top of the file, `.shell` which can be