The Fill Mask option enables you to quickly fill-in an outline drawn with the brush. It is an ideal aid to your workflow when working with large selections, particularly when there are areas that require intricate brush-work. Simply select the brush, draw around the edge of the area that you want to mask, then use this option to complete the selection. If there are multiple areas on a layer, the Fill Mask command will fill each. If you have not drawn an outline, the Fill Mask will completely fill a layer with a mask (like the New Filled Layer option), which is useful when brushing away adjustments is the simpler option.
- From the Layers tool, long-press on the Draw Mask button. Repeat and select the Always Display Mask (M) option.
- Carefully draw around the edge of the area that you want to apply the mask to. The outer edge of the brush stroke will form the edge of the mask. Ensure that there is a continuous outline around the area required.
- Go to the Layers tool and click on the Action menu, the (...) icon, and select Fill Mask from the menu. The selection is filled automatically with a mask.
- Toggle the mask off using the shortcut M or select Never Display Mask option from the Layers tool.
- Apply the desired adjustments to the masked area.
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