I want to cover over part of an image. Normally I do this by adding a rectangle shaped with the same colour as the background. This works fine when the background is a single colour.
However, in a particular PowerPoint house style the background has a gradient colour (from blue at the top to green at the bottom). Is there an easy way to add one (or multiple) shape(s) (particularly rectangles) that completely match the background?
Failing that - is there a simpler way to cover part of an image? (I'm using shapes so that, using animation, I can remove the shape and reveal the rest of the image.)