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 masks resolution
will be the same as the paint objects 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 objects 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, its 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.