Adobe 23101335 User Guide - Page 198

188 CHAPTER 7 Using Channels and Masks • 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. 6 Click OK. To duplicate a channel by dragging: 1 In the Channels palette, select the channel you want to duplicate. 2 Do one of the following: • To duplicate a channel within an image, drag the channel into the image window or onto the New Channel button ( ) at the bottom of the palette. • To duplicate a channel to another image, make sure that the destination image is open. Then drag the channel into the destination image window. Splitting channels into separate images You can split the channels of a flattened image into separate images. 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 abbreviation (Windows) or full name (Mac OS). Any changes since the last save are retained in the new images and lost in the original. Splitting channels is useful when you want to retain individual channel information in a file format that doesn't preserve channels. Note: Only flattened images can be split. (See "Flattening all layers" on page 248.) To split channels into separate images: Choose Split Channels from the Channels palette menu. Merging channels Multiple grayscale images can be combined into a single image. Some grayscale scanners let you scan a color image through a red filter, a green filter, and a blue filter to generate red, green, and blue images. Merging lets you combine the separate scans into a single, color image. Note: You can also blend the data in one or more channels into an existing or new channel. (See "Mixing color channels (Photoshop)" on page 190.) The images you want to merge must be in Grayscale mode, have the same pixel dimensions, and be open. (See "Changing the pixel dimensions of an image" on page 97.) The number of grayscale images you have open determines the color modes available when merging channels. For example, you can't merge the split channels from an RGB image into a CMYK image, because CMYK requires four channels and RGB requires only three. Note: If you are working with DCS files that have accidentally lost their links (and so cannot be opened, placed, or printed), open the channel files, and merge them into a CMYK image. Then resave the file as a DCS EPS file.