diff --git a/Hotkeys.md b/Hotkeys.md
index e426ce6..84ebb9d 100644
--- a/Hotkeys.md
+++ b/Hotkeys.md
@@ -18,8 +18,8 @@ Adding elements:
 * <kbd>Shift</kbd> - hold to continue adding elements on click (e.g. burgs and labels)
 
 Heightmap editor:
-* <kbd>Ctrl + Z</kbd> - undo an action
-* <kbd>Ctrl + Y</kbd> - redo an action
+* <kbd>Ctrl</kbd> + <kbd>Z</kbd> - undo an action
+* <kbd>Ctrl</kbd> + <kbd>Y</kbd> - redo an action
 
 The result will be displayed in the Console (<kbd>F12</kbd> in Chrome):
 * <kbd>S</kbd> - log countries data as a table