User Guide

Chapter 7: Sprite Technology
To edit a channel mask:
1. Select the masked object.
2. Choose Object | SpriteLayers | Edit Channel Mask. The masked object appears in channel
mask edit mode.
In this mode, the channel mask is active and the object is also visible. You can paint in the
channel or modify it to change the transparency of the underlying object.
3. Press Esc to leave edit mode when you finish editing. The object remains selected.
Selecting views for channel mask editing
You have a choice of view when you edit an object’s channel mask. You can display the object and the
channel mask together, which shows you the overall effect of the mask as you edit it. Or, you can
hide the object to concentrate on the channel mask alone.
For information on selecting views with the Channels palette, see "Editing channel masks" on page
510).
Selecting views in the Transparency palette
You can use the Transparency palette to change your view when you edit a channel mask. In channel
mask edit mode, two buttons let you select editing views. Click the triangle at the lower left to expand
the palette if necessary to display the buttons.
To view the channel mask only:
In the Transparency palette, click Channel Mask Only. This is the same as hiding the “object
channel” in the Channels palette.
To view the object and channel mask:
Click Image and Channel Mask. This is the same as making the “object channel” and the
channel mask visible in the Channels palette.
To remove a channel mask:
Removing a channel mask from an object removes the transparency effect produced by the channel
mask.
1. Select the masked object.
2. Choose Object | SpriteLayers | Detach Mask. Canvas removes the channel mask from the
selected object.
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