diff --git a/binaries/data/mods/public/gui/manual/intro.txt b/binaries/data/mods/public/gui/manual/intro.txt
index 590111a645..c13e3adf56 100644
--- a/binaries/data/mods/public/gui/manual/intro.txt
+++ b/binaries/data/mods/public/gui/manual/intro.txt
@@ -66,7 +66,9 @@ Pause: Pause/resume the game
 Delete: Delete currently selected units/buildings
 Shift + Delete: Delete currently selected units/buildings without confirmation
 ,: Select idle fighters
+Shift + ,: add idle fighter to selection
 .: Select idle workers (including citizen soldiers)
+Shift + .: add idle worker to selection (including citizen soldiers)
 H: Stop (halt) the currently selected units.
 Ctrl + 1 (and so on up to Ctrl + 0): Create control group 1 (to 0) from the selected units/buildings
 1 (and so on up to 0): Select the units/buildings in control group 1 (to 0)