i just added a title sequence to my video that consisted of a still image (standard 720x480) and a text overlay. the overlay has white text and a black background. i set a chroma key color of white so the still will show thru the text and added a zoom effect where the overlay starts zoomed in in the middle of the view then zooms out until the text is not visible anymore. the thing is, the outside area of the still is still visible when the overlay is zoomed in when i would prefer the overlay take up the entire view space (cover the outside area of the still). i can't remember if i've done this before (seems to me i have) but if i have, i can't remember how to do it or if it's even possible. suggestions?