bronwydd

As a relative newcomer to PTE, I'm trying to put together a show with all Portrait format shots. I would like to be able to do a few zooms and pans within the sequence, but zooming always changes the width of the projected image. I have partially succeeded by using an image with a black centre as a mask and then inserting an image, which is it's inverse, but this is extremely fiddly for a couple of images let alone a whole sequence. Is there a simple way to achieve this? Dave