diff --git a/README.md b/README.md
index 29ab38d..a099ae9 100644
--- a/README.md
+++ b/README.md
@@ -203,6 +203,8 @@ f | Toggle fullscreen
 s | Save composition
 z | Undo
 BACKSPACE | Delete surface
+SPACE | Deselect surface (projection mapping mode)
+Arrow keys | Move selection. If no surface is selected in the projection mapping mode, all surfaces are moved.
 
 ### SSH Remote Control