For this, you can pick any power you like and describe how it would work.
Here is an example of an active method and a passive method:
Power: Omni-Customization
Active: My power works through an augmented reality-like display. There is a floating symbol, and by touching it or mentally confirming that you’d like to customize something, the power will activate. Once activated, everything other than you will stop, even things not bound by time will freeze. Menus with various customization options will appear, and you can interact with these menus using speech, thought, or touch.
Passive: My power works by predicting the changes I would make beforehand and making the alterations for me.