Page 482 - ProShow Producer 9 Final Manual
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Keep in mind that not all file types support transparency. The most
common image format, JPEG, does not support transparency, so you won’t
be able to use JPEG files as transparency masks. To use an image as a
transparency mask, you’ll need to look for a file format that supports
transparency such as PSD, PNG, GIF or TIFF.
Let’s say you use an image of a heart. You would add the heart to your
layers list, convert it into a mask, and it would attach itself to the layer
beneath it. This would cause your masked image to appear in the shape of
a heart.
Just as with Grayscale masks, you can also select a Transparency Inverted
mask type. In this case, the inverted mask would block out everything
inside the heart shape.
