It's not quite clear what you're asking, True. Are you saying your video frame is divided into a grid and you want your transition to affect only one portion of the grid or a picture-in-picture?
Sounds like picture-in-picture to me.
Yes I have a picture in picture which is a .Tif file projected on a portion of the video. The .Tif files change just like in a slide show & wish to have page peel effect apply only to the projected area.
The questions I have can I apply a matte to a transition?
How do I effect only the projected area?
There is not an easy way to do this.
The only real way to do this in Premiere Elements is to make a separate project which includes your slide and its transition. Use Publish & Share/Computer/AVI to output this segment. Then import this AVI into your project and use it as your PIP.
Steve Grisetti solution worked perpectly!
That is sort of like the workflow in PrPro, where one would create a Sequence (think of a mini-Project, in a Project), then edit with the desired Transition, and then Nest that Sequence into a new one, where the PiP would be created from it. In PrE, there are no Sequences, so no Nesting, but you got around that by editing in a Project, then Exporting/Sharing, to then Import into another Project. More than one way to "skin a cat."
Steve G. always has some great workflow modifications, to get most things to work in PrE. Those suggestions are always greatly appreciated.