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1.
.
Image - Mode - Grayscale
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2.
1. . .
2. Ctrl + A.
3. Channels
4. Save selection as a channel
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3.
1. . , , , , . - . .
2. CTRL . , .

4.
1) Ctrl+C , .
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2) Ctrl + V. .
, , , Ctrl + ( )
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