Removing Image Layers - Ulead GIF ANIMATOR 4.0 User Manual

Removing image layers

In the course of the animation, each image layer must be 'removed' from the screen once it
has been displayed. The removal method affects the overall appearance of the animation -
some web browsers, however, don't support all the removal methods available. You can set an
image layer' s removal method on the Attribute toolbar in the How to remove option. The four
removal methods are described below:
•
Web Browser Decides - The image layer
is removed using the browser' s default
method. This method is not recommended
because you will probably get different
effects with different browsers.
•
Do Not Remove - The image layer is not
cleared from the screen and all subsequent
image layers are stacked on top of it.
•
To Background Color - The image is
removed and replaced with the back-
ground color. This can cause flashing if
used improperly.
•
To Previous State - The image layer
disappears in the same manner it ap-
peared. This is generally the best removal
method, but unfortunately, only Microsoft
Internet Explorer supports this at this
time.
Note: In order to make GIF Animations that are
completely cross-browser compatible, make all
your image layers full size and then use 'Do not
remove'. When you run the Optimization Wizard,
GIF Animator removes all the redundant pixels
between images. With the Do not remove option
set for each layer, just enough overlap is
retained during optimization that image layers
mask out the differences from previous layers
as they are stacked during the animation.
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