I call them my "Praying Handles", because everytime I go for some air...the person always screams...."OHHH JESUSSSS! as they grab for the handles.

Anyhow, those ones are easy..just pry up the outsides and slide them towards the center. They are tough to move, just make sure as your prying not to slip and poke a whole through something. If you have a rubber-coated (or wrap a cloth around it) very small screwdriver you will not damage the plastic on the handles.