If a picture has transparent areas, you can change them to opaque (white fill) or from opaque back to transparent again so that the background color or image shows through. You cannot use the opacity level to make the background semi-opaque.
Add a transparent area to a picture
If the picture does not have a transparent area, you can make one. You can create a transparent area in most pictures.
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Select the picture that you want to create transparent areas in.
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Click Picture Tools > Recolor > Set Transparent Color.
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In the picture, click the color you want to make transparent.
Notes:
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The Set Transparent Color option is available for bitmap pictures that don't already have transparency information. It's also available for some, but not all, clip art.
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To create a transparent area in an animated GIF, use an animated GIF editing program, and then insert the file again.
Change from transparent to opaque
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Select the picture.
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Press CTRL+T.
