Can I edit rollover color for built in Captivate buttons?

Image buttons are "old" (I never use them anymore): to customize you'll have to create three images with a graphical application. The images need to have the same name, followed by respectively _up   _over  and _down. You can use PNG, GIF, or any other compressed format. Have a look at the Gallery\Buttons for examples. When you want to use such custom button, you point to one of the three images, and Captivate will detect the other two. One of the biggest drawbacks for me of that type is that you cannot change the label, you have to create 3 images for each button with a different label. Way easier with shape and transparent buttons.