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Select White Area of Layer?

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If I have a black and white pixel layer (or a grayscale pixel layer), is there a way for me to select the white area of it? I'm essentially creating a mask on a pixel layer, but now what to select it so I can actually apply it as a mask on a mask layer. It's a luminosity representation, so I ideally want to transfer it as is to a mask layer.



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You can use the Flood Selection Tool (‘magic wand’) for this. Just make sure the tolerance is set to zero if you only want to select the pure white, and turn the ‘Contiguous’ toggle on or off as appropriate.

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Affinity Designer/Photo/Publisher • Windows 10 Home (4th gen Core i3 CPU)
Affinity Photo for iPad • Designer for iPad • iOS 12.4.1 (iPad Air 2)

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