Every tonal and color change made through the Image menu is permanent — once applied, those edits are baked into the pixels with no way to revisit individual settings. Adjustment layers solve this by keeping each change on its own editable, maskable layer, so nothing in the original image is ever touched.
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Practical Tips
These techniques apply directly to building a flexible, revisable editing workflow in Photoshop.
- Use the Adjustments panel to add layers like Levels, Brightness/Contrast, and Hue/Saturation — each remains independently editable by double-clicking its icon.
- Use the Reset button in the Properties panel to undo changes within an adjustment layer without deleting it or affecting other layers.
- Paint on an adjustment layer's mask with a black brush to remove the adjustment from specific areas, such as keeping saturation only in a selected region.
- Use a Stamp Visible layer (Ctrl+Alt+Shift+E) when pixel-based tools like the Spot Healing Brush are needed, then continue stacking adjustment layers on top.
- Experiment with blend modes on individual adjustment layers — changing to Lighten, Darken, or Color Burn can produce results that a slider alone cannot achieve.
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