To use the Transparency palette You can use the Transparency palette to create a blank channel mask. To open the Transparency palette, see “Using the Transparency pal- ette” on page 20.355. 1 Select an object to mask. 2 In the Transparency palette, choose Channel in the Mask pop- up menu. •   If the object to be masked is not a paint object, a dialog box asks you to set the resolution of the mask. Enter a resolution from 1 to 2,540 ppi and click OK. •   If the object is a paint object, the channel mask’s resolution will be the same as the paint object’s resolution. 3 The object appears in channel mask edit mode, with the object visible and the channel mask selected. You can edit the channel mask with painting tools. “Editing channel masks” on page 20.365. 4 When you finish, press Esc to leave edit mode. Setting the channel mask scope When you apply a channel mask to a vector object, the channel mask affects the vector object’s fill ink or its fill ink and stroke (pen ink). To change the effect, change the Scope setting in the Transparency palette. See “Controlling the scope of transparency effects” on page 20.359. Masking with a paint object You can create a channel mask by attaching a paint object to another object. If you have an existing paint object that you want to use as a channel mask, it’s quicker to use this procedure than to use the Chan- nels palette to place the paint object in a channel mask. To attach a channel mask 1 Place a paint object to use as a mask in front of the object to be masked. The two objects do not have to overlap or touch, but the paint object must be in front of the other object in the stacking order. 2 Select both objects.
Canvas 8 Help: SpriteLayer effects (10 of 24)                                                       Page #364