Adobe Photoshop CS2 On Demand [Electronic resources] نسخه متنی

Loading Channel Masks

Once you create a channel mask, and you can have up to 28 separate masks in one document, the next step is to use the masks. To save the channel mask all you have to do is save the document in a format that supports channels, such as Photoshop's native .psd format, or even the .tif format. The next time you open the document, your channel masks will be there. Deleting a channel mask is simple; just drag the channel mask over the Delete button, located at the bottom of the Channels palette, or select the channel mask you want to delete, and click the Delete button. However sooner or later, you're going to want to do more than just save or deleteyou're going to want to use a channel mask. Using a channel mask involves a process of converting the mask back into a selection. It's an easy step, but necessary to complete the process from mask to selection.

Load Channel Masks

Open a document that contains a channel mask, or create a new channel mask.

Click the

Select menu, and then click

Load Selection .

If more than one document is open, click the

Document list arrow, and then select the document you want to use.

Click the

Channel list arrow, and then click the channel you want to convert into a selection (native color channels do not appear in this list).

Select the

Invert check box to instruct Photoshop to use the black areas of the mask (instead of the white areas) for the selection.

Select the Operation option you want to perform:

• 
  

  New Selection.
  Creates a new selection.

• 
  

  Add To Selection.
  Adds the channel mask to an existing selection.

• 
  

  Subtract From Selection.
  Uses the channel mask to subtract from an existing selection.

• 
  

  Intersect With Selection.
  Uses the channel mask to intersect, based on an existing selection.

Click

OK .

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