• Choose a destination. Open images only 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.

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

• 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.

The original file is closed, and the individual channels appear in separate grayscale image windows. The title bars in the new windows show the original filename plus the channel. You save and edit the new images separately.

You must have more than one image open for the Merge Channels option to be available.

If you enter a number that is incompatible with the selected mode, Multichannel mode is automatically selected. This creates a multichannel image with two or more channels.

The selected channels are merged into a new image of the specified type, and the original images are closed without any changes. The new image appears in an untitled window.