Index: /home/abian/0ad/binaries/data/mods/public/gui/session/selection_panels.js
===================================================================
--- /home/abian/0ad/binaries/data/mods/public/gui/session/selection_panels.js
+++ /home/abian/0ad/binaries/data/mods/public/gui/session/selection_panels.js
@@ -63,10 +63,12 @@
 		case "raise":
 			data.icon.sprite = "stretched:session/icons/bell_level1.png";
 			data.button.tooltip = translate("Raise an alert!");
+			data.button.tooltip += "\n" + bodyFont(translate("Garrison the Support units nearby."));
 			break;
 		case "end":
+			data.icon.sprite = "stretched:session/icons/bell_level0.png";
 			data.button.tooltip = translate("End of alert.");
-			data.icon.sprite = "stretched:session/icons/bell_level0.png";
+			data.button.tooltip += "\n" + bodyFont(translate("Unload the Support units."));
 			break;
 		}
 		data.button.enabled = controlsPlayer(data.player);