Saving a Selection as an Alpha Channel

If the image that you’re editing requires you to make a complicated selection, it’s always a good idea to save it just in case you need to use it again. For example, it was necessary to select the saw in order to apply different image adjustments to the foreground and background areas. Making this selection was a tedious task, to say the least. The Magic Wand would not recognize the inlets around the saw, even after I adjusted the Tolerance setting. It would be too timeconsuming to draw a path around the saw; therefore, I made the selection with the Magnetic Lasso. Thinking ahead, I also saved the selection as soon as I completed it. I didn’t want to go through the tedious process of making this selection all over again should I need it later.

To save a selection, choose Select ➢Save Selection. In the dialog box that appears, enter a name for the selection and click OK. The selection is stored as an alpha channel, accessible in the Channels palette. Alpha channels remain in the document until you manually delete them from the palette.

Any time you want to retrieve a saved selection, choose Select --> Load Selection. Choose the selection from the drop-down list in the Load Selection dialog box and click OK. Photoshop displays the selection path exactly as you saved it.

Saving and Loading a Selection from the Channels Palette
Alpha channels are essentially saved masks. To save a selection as an alpha channel from the Channels palette, make your selection, display the Channels palette (Window --> Channels), and choose New channel from the palette menu. In the dialog box that appears, choose whether the color displayed in the channel should indicate the masked area or the selected area. Choosing Masked Areas applies a red tint over the image when the channel is made visible in the palette. Choosing Selected Areas displays no color at all.

Click OK to exit the dialog and then click the eye icon next to the alpha channel in the palette to make it visible. If you chose Masked Areas in the dialog, the red tint should appear over your entire image. Press Delete/Backspace to remove the tint from the selected area and save the selection as a mask in the alpha channel. If you chose Selected Areas in the dialog, press D to set the default colors of black foreground and white background, and then press Option+Delete / Alt+Backspace to fill the selection with the foreground color (black). The selection area fills with a red tint in the alpha channel. Click the eye icon again to hide the mask. You can then load the saved selection by F/Ctrl+clicking on the alpha channel icon in the Channels palette.

You can store multiple selections in a document this way and access them at any time. Also, if you open the dialog with a selection already made, you can gain access to additional options that allow you to use the Add To, Subtract From, or Intersect features with the selection that you chose from the menu. You also have the option to invert a selection as you load it. In the Load Selection dialog box, choose the saved selection from the menu, click the Invert option, and click OK.
Saving a Selection as an Alpha Channel Saving a Selection as an Alpha Channel Reviewed by Pepen2710 on 10:37:00 PM Rating: 5

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