The command makes all pixels with a specified color in the current layer transparent. For more details see 第 8.57 节 “Color to Alpha…”.
               
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            注意 | 
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               This command only works on a single layer.  | 
          
You can access this command
From the main menu through → → .
From the main menu through → (see 第 8.57 节 “Color to Alpha…”).