CVar deselectOnClick

__NOTOC__
Clear the target when clicking on terrain - ie 'Sticky Targetting'
 
==Default Setting==
;0
==Possible Settings==
;0 :Off
;1 :On
==Changing this setting==
In-game, type the following
 /console deselectOnClick setting
Alternatively, you can exit wow, open the Config-cache.wtf file, and add the following line:
 SET deselectOnClick setting
deselectOnClick