Adobe AFTER EFFECTS 5.5 Help Manual page 115

Adobe After Effects Help
Using Help | Contents
3 Place the cursor over the underlined value and drag to the left or right to change the
value.
To change a layer value numerically in the Timeline window:
1 In the Timeline window, select the layer you want to modify.
2 Display the layer property that you want to change. See the previous section for infor-
mation on displaying layer properties.
3 Do one of the following:
Click the underlined value that you want to change, type a new value, then press Enter
•
(Windows) or Return (Mac OS).
Right-click (Windows) or Control-click (Mac OS) the underlined value you want to
•
change and choose Edit Value. Type new values and click OK.
Note: If you are changing Anchor Point values, note that the anchor point's coordinates
are relative to the Layer window, not the Composition window. For information on layer
coordinates, see "Info palette" on page 23.
To animate a layer property:
1 Display the Timeline and Composition windows for a composition.
2 In the Timeline window, select the layer that you want to animate.
3 Move the current-time marker to the time where you want to begin the animation.
4 Display the layer property that you want to change.
5 Set the layer's value. See the above procedures "To set a layer property by dragging in
the Timeline window" or "To change a layer's value numerically in the Timeline window"
for information on setting a layer's value.
6 Set an initial keyframe. For information on setting keyframes, see "Setting keyframes"
on page 98.
7 Move the current-time marker to the time where you want to add the second keyframe.
8 Change the value for the layer.
9 Repeat steps 7 and 8 as many times as you want to add more keyframes.
Setting and animating mask properties
Masks are paths that you draw or import into a Composition or Layer window to create
transparent areas for a layer. In the Timeline window, you can set mask shape, mask
feather, mask opacity, and mask expansion properties and change these properties over
time. You can also set interactions between different masks within a layer and set the type
of interaction used between the mask and the layer itself. For information on setting mask
properties, see the corresponding section for the property you want to set. For example,
to set the Mask Opacity property, see "Adjusting the opacity of a mask" on page 157. For
information on animating mask properties, see "Animating a mask" on page 160.
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Animating Layers
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