Update mangohud.md

Author: Managor

Diff for: pages/linux/mangohud.md

@@ -6,3 +6,15 @@
 - Use `mangohud` on top of an application:
 
 `mangohud {{command}}`
+
+- Change overlay position:
+
+`<RightShift F11>`
+
+- Change overlay verbosity:
+
+`<RightShift F10>`
+
+- Toggle overlay visibility:
+
+`<RightShift F12>`