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| Sample text. An image can have
up to 56 channels. The file size required for a channel
depends on the pixel information in the channel. Certain
file formats, including TIFF and Photoshop formats,
compress channel information and can save space. The
uncompressed size of a file, including alpha channels
and layers, appears as the rightmost value in the
status bar at the bottom of the window when Document
Sizes is chosen from the pop-up menu. As long as you
save a file in a format supporting the image's color
mode, the color channels are preserved. Alpha channels
are preserved only when you save a file in Adobe Photoshop,
PDF, PICT, Pixar, TIFF, or Raw formats. DCS 2.0 format
preserves only spot channels. Saving in other formats
may cause channel information to be discarded. |
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