Many features in Fusion 360 require a user to input selections as a step; whether that be to select edges for a fillet, selecting multiple faces to sculpt, or selecting mounting holes for a simulation constraint, they all use a similar input.
That’s why knowing how to accurately and efficiently modify inputs for these selections can help users significantly. To see one way to edit your selections check out the video below:
Taylor Stein also covered some of the other tools this key-combo unleashes. Check out that video here.