Photoshop

Duplicate channels

You can copy a channel and use it in the current image or another image.

Duplicate a channel

If you are duplicating alpha channels between images, the channels must have identical pixel dimensions. You cannot duplicate a channel to a Bitmap‑mode image.

  1. In the Channels palette, select the channel to duplicate.
  2. Choose Duplicate Channel from the Channels palette menu.
  3. Type a name for the duplicate channel.
  4. For Document, do one of the following:

    • Choose a destination. Only open images with pixel dimensions identical to the current image are available. To duplicate the channel in the same file, select the channel’s current file.

    • Choose New to copy the channel to a new image, creating a multichannel image containing a single channel. Type a name for the new image.

  5. To reverse the selected and masked areas in the duplicate channel, select Invert.

Duplicate a channel in an image

  1. In the Channels palette, select the channel you want to duplicate.
  2. Drag the channel onto the New Channel button  at the bottom of the palette.

Duplicate a channel in another image

  1. In the Channels palette, select the channel you want to duplicate.
  2. Make sure that the destination image is open.
    Note: The destination image does not have to have the same pixel dimensions as the duplicated channel.
  3. Do one of the following:

    • Drag the channel from the Channels palette into the destination image window. The duplicated channel appears at the bottom of the Channels palette.

    • Choose Select > All, and then choose Edit > Copy. Select the channel in the destination image and choose Edit > Paste. The pasted channel overwrites the existing channel.