How to Crowd Control?

Looking for info on how to mark the target with x , square, skull etc and sheep / banish that target. Thanks and merry christmas.

Not sure if this is what you're looking for, but here's what I did when I was running a group of mages.....

Press 4, mage 1 would set the icon to blue square and set that target as his focus.
Press 5, mage 2 would set the icon to moon and set that target as his focus.
Press 6, mage 3 would set the icon to orange circle and set that target as his focus.

Press 7, all mages would sheep their focus target.