Talk:Unit Skills/@comment-30406012-20171221154234/@comment-30054866-20171221154653

Once the Overdrive gauge is filled (which is seen at the bottom of the screen, assuming you have a unit who has access to UBBs), swipe left on the unit whose UBB you want to activate. This will activate their respective UBB gauge, which must be filled before being used. To activate it, swipe as you would to activate a BB or SBB.

I hope this helped! (^^)/