If you mean like bounce in movement the way you do it is
@overlay Overlayname shifts to 50 50 in 1 using easein
You have to have a time in order for it to work so if I just use
@overlay Overlayname shifts to 50 50 using easein
That wouldn’t work because there’s no set time I recommend watching This video for all the ease commands on overlays, you can also use these functions on zooms 