User Guide

CHAPTER 7
250
Working with Masks and Transparency
To adjust feathering in the Timeline window:
1 Expand the desired layer and its Mask properties.
2 Drag the underlined value for Mask Feather.
Note: When you adjust feathering by dragging the single underlined value in the Timeline
window, you change both the horizontal and vertical feathering. To have the Timeline display
both the horizontal and vertical values, first type different values for horizontal and vertical
feathered edges using the above method for adjusting precise values.
Adjusting the edges of a mask
To finely expand or contract all the edges of a mask, use the Mask Expansion property.
This property value represents, in pixels, how far from the original mask edge you are
expanding or contracting the adjusted edge.
To adjust the edges of the mask using Mask Expansion:
1 In the Timeline window, expand the Mask properties of the layer you want to adjust.
2 Drag the underlined value for Mask Expansion.
Adjusting the opacity of a mask
Masks have an opacity property that you can use to adjust the transparency of any mask,
or even to turn masks on and off temporarily.
To adjust the opacity of a mask:
1 In the Timeline window, expand the mask properties of the mask you want to adjust.
2 Drag the underlined value for Mask Opacity.
UG.book Page 250 Wednesday, February 21, 2001 12:05 PM