Add infos to help using for_window to man 5
@@ -770,17 +770,20 @@ Mark all Firefox windows with "Browser":
[class="Firefox"] mark Browser
```
+You may like to use swaymsg -t get_tree for finding the values of these
+properties in practice for your applications.
+
The following attributes may be matched with:
*app_id*
Compare value against the app id. Can be a regular expression. If value is
\_\_focused\_\_, then the app id must be the same as that of the currently
- focused window.
+ focused window. _app_id_ are specific to Wayland applications.
*class*
Compare value against the window class. Can be a regular expression. If
value is \_\_focused\_\_, then the window class must be the same as that of
- the currently focused window.
+ the currently focused window. _class_ are specific to X11 applications.
*con_id*
Compare against the internal container ID, which you can find via IPC. If
