Method 5: Selective Toning with Masks

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The prior four methods can work even better when combined, using masks. Click on a layer or adjusment layer to select it, then click the mask icon at the bottom of the Layers panel to add a layer mask. With the mask selected, paint on your image with a soft-edged black brush to hide a previously applied tone effect; use a white brush to restore it. Vary brush opacity as needed