CVar displaySpellActivationOverlays

Whether to display Spell Activation Overlays (a.k.a. Spell Alert system introduced in 4.0.1).

Default Setting

 * 1

Possible Settings

 * 0 :Off
 * 1 :On

Changing this setting
In-game, type the following /console displaySpellActivationOverlays setting

Alternatively, you can exit wow, open the Config-cache.wtf file, and add the following line: SET displaySpellActivationOverlays setting