diff --git a/README.md b/README.md
index 3c50720..e0109eb 100644
--- a/README.md
+++ b/README.md
@@ -39,7 +39,7 @@ Here's the default ones:
 | Meta+Shift+S             | Move window down                                                                                                               |
 | Meta+Shift+Home          | Move window to start                                                                                                           |
 | Meta+Shift+End           | Move window to end                                                                                                             |
-| Meta+X                   | Toggle stacked layout for focused column                                                                                       |
+| Meta+X                   | Toggle stacked layout for focused column (One window in the column visible, others shaded; not supported on Wayland)           |
 | Meta+Ctrl+Shift+A        | Move column left                                                                                                               |
 | Meta+Ctrl+Shift+D        | Move column right                                                                                                              |
 | Meta+Ctrl+Shift+Home     | Move column to start                                                                                                           |