Other Aspects of Working with Layers
The following are some other important things to note when you are working with Photoshop Layers.
Converting Color Spaces Using Adjustment Layers •. Some types of layers (including Levels, Curves, and Color Balance) cannot be preserved if subjected to a color space conversion (e.g., using Image ▸ Mode ▸ CMYK). If you think you need to convert the color space of your image, either do so early in the workflow or convert a copy of your image.
Copying Adjustment Layers •. You can save and apply adjustment layers the same way you can save RAW corrections for application to other images. First, open the target image and the image that contains the adjustment layer you wish to apply. Then, select the adjustment ...