Tactical Time Dilation can be activated by pressing RB.
At level 20 in Ranged, and 40 in Melee, locations will be marked on enemies during TTD.
Hovering over the groin with most weapons will display the "Weaken" status effect.
-As SpinkyDink mentions, the TTD damage zone indicator skill MAY not be necessary.
-Many creatures have groins, robots do not.