diff --git a/Global-Variables.md b/Global-Variables.md
index e1bfc2f..362521f 100644
--- a/Global-Variables.md
+++ b/Global-Variables.md
@@ -1,4 +1,5 @@
 **Global variables** affect the drawing, input or event dispatcher routines. Their names always start with the **[[__UI_ prefix]]**.
 
 * [[__UI_ForceRedraw]]
-* [[__UI_KeyHit]]
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+* [[__UI_KeyHit]]
+* [[__CtrlIsDown|Keyboard modifiers]], [[ShiftIsDown|Keyboard modifiers]], [[AltIsDown|Keyboard modifiers]]
\ No newline at end of file