My photo starts from the upper left corner and covers about 1/2 the page in both directions. I want to fade it in from the right at the top and also from the left at the bottom, but at different rates of fading, distance and shape. Can I accomplish that at one time? Or, do I need to apply one transparency save it as a separate bitmap and then apply the second transparency?
Might try overlaying a lens at each corner.
Create two white triangles at either corner of the image. Use the transparency tool to "fade" each triangle as desired.