Setting An Image Layer's Transparency - Ulead GIF ANIMATOR 4.0 User Manual

Setting an image layer' s transparency
One of the special features about the GIF file format is the transparency attribute, which
allows you to select a specific color and then make it effectively invisible to all dedicated GIF
viewing software, including web browsers. This lets you create custom shapes that don't
conflict with the content of your web pages. For example, if you have an image of a basketball
on a black background, and you want your web page to show through the background, you
would make the black color transparent.
To set an image layer' s transparency:
1 Select the layer to which you want to
apply transparency.
2 On the Attribute toolbar, select the Trans-
parent index option.
3 If you know the indexed color value for
the color in the image you want to make
transparent, enter it in the Transparent
index box.
Otherwise, click the Edit tab to switch to
that mode.
4 On the Attribute toolbar, click the Color
box under the Transparent index setting.
Your mouse cursor becomes a color
picker.
5 Select the color you want to make trans-
parent from either the image layer itself
(this only works in Edit mode), or from
the Palette toolbar.
Note: You can make multiple layers transparent
simultaneously by selecting them all and then
clicking the Transparent index option. Selecting a
different color for each one, however, must still
be done manually.
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