Do not record hidden layers in undo records.
GIMP 2.10.8 on Xubuntu 18.04_64bit
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For example, create a new layer on a painting, the layer blending mode chooses HSL-Color (Fill black) to see the lightness of the painting.
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When you use HSL-Color-Layer to see the effect changes. Then hide this layer.
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You will undo if you are not satisfied, but the Hidden-Layer will appear again!
But this time it should continue to hide the HSL-Color-Layer without needing it to appear.
Updated on 2020-12-30
My previous way was wrong!
The correct way to view the black-and-white relationship of images:
- Method 1: Menu Colors -> Desaturate -> Desaturate... (Default options: Luminance)
- Method 2: Menu Image -> Mode -> Grayscale
Method 1 is very convenient.
Edited by SenlinOS