Adobe 29180155 - Photoshop Elements 4.0 Tutorial page 399

pixels with a matte color, or you can create hard-edged transparency.
Create a matted GIF or PNG image
When you know the background color of the web page on which an image will be displayed, you can use the matting feature to fill or blend
transparent pixels with a matte color that matches the web page background.
1. Open or create an image that contains transparency, and choose File > Save For Web.
2. In the Save For Web dialog box, select GIF, PNG-8, or PNG-24 as the optimization format.
3. For GIF and PNG-8 format, do one of the following:
To keep fully transparent pixels transparent, and blend partially transparent pixels with the matte color, select
Transparency. This option prevents the halo effect you see when you place an anti-aliased image on a web page
background that differs from the image background. This option also prevents the jagged edges of hard-edged
transparency.
To fill transparent pixels with the matte color and blend partially transparent pixels with the matte color, deselect
Transparency.
4. Select a color from the Matte menu:
Eyedropper Color (to use the color in the eyedropper sample box)
White, Black, or Other (to select a color using the Color Picker)
Create hard-edged transparency in a GIF or PNG-8 file
Use hard-edged transparency when you don't know the background color of a web page, or when the web page background contains a texture or
pattern. However, keep in mind that hard-edged transparency can cause jagged edges in the image.
1. Open or create an image that contains transparency, and choose File > Save For Web.
2. In the Save For Web dialog box, select GIF or PNG-8 as the optimization format.
3. Select Transparency.
4. Select None from the Matte menu.
Create a matted JPEG image
Although the JPEG format does not support transparency, you can specify a matte color to simulate the appearance of transparency in the original
image. The matte color fills fully transparent pixels and blends with partially transparent pixels. When you place the JPEG on a web page with a
background that matches the matte color, the image appears to blend with the background.
1. Open or create an image that contains transparency, and choose File > Save For Web.
2. In the Save For Web dialog box, select JPEG as the optimization format.
3. Select a color from the Matte menu: None, Eyedropper Color (to use the color in the eyedropper sample box), White, Black, or
Other (to select a color using the Color Picker).
When you select None, white is used as the matte color.
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