Option+double-click (Mac) or Ctrl+double-click (Windows)
the masked object.
Select the masked object and choose Object >
Transparency > Edit Channel Mask.
Select the masked object and click Edit in the Transparency
palette.
When you finish editing a channel mask, press Esc to leave edit
mode.
Detaching and deleting channel masks
If an object has a channel mask, the channel mask controls the trans-
parency of the object. You might want to detach or delete the channel
mask to eliminate the transparency effects from the object.
When you delete a channel mask, it no longer exists in the document.
When you detach a channel mask, it appears in the document as a
separate grayscale paint object.
To detach a channel mask: Select the masked object. Choose
Object > Transparency > Detach Mask.
When you detach a channel mask, Canvas removes the channel mask
from the object and places it in the document as a separate grayscale
paint object. If the channel mask was detached from a vector object,
the resulting paint object will contain any alpha channels that were
contained in the vector object.
To delete a channel mask
1
Select the masked object.
2
In the Transparency palette, choose None in the Mask pop-up
menu.
Note: Deleting the channel mask of a vector, text, or group object
also deletes any alpha channels that were contained in the object.
Also, if you ungroup a group object that has a channel mask, Canvas
deletes the channel mask.
You can delete a paint objects channel mask when the paint object is
in edit mode by dragging the channel mask to the trash can icon at the
bottom of the Channels palette.