Microsoft Expression Web: Set the Transparency of an Image
Contributed by shamanstears 
January 13, 2007 
Tagged: Web application programming
Giving a color transparency in Expression Web can be quite useful, especially if the image has a background color different from that of the page. To do this…
1. Click View.
2. Click Toolbars and select Pictures.
3. Select the image that you wish to set the transparency.
4. Click the Set Transparent Color button on the Pictures toolbar. If the image is not a GIF, Expression Web will automatically convert the image to that format.
5. Select the color you wish to make transparent.