How do you save a Photoshop file with layers intact?

To save a Photoshop file with layers intact, it is best to use PSD or PSB format. The PSD format is the standard file format for Adobe Photoshop, designed specifically to retain all features of the original file, including layers, effects, text, and adjustments. When working on projects that require future editing, maintaining all these layers is crucial, and the PSD format ensures that this information is preserved.

PSB, on the other hand, is used for larger files that exceed the limits of the PSD format and is similar in functionality. Both formats allow you to return to your project later and continue editing without loss of data or layer structure.

Other formats like JPEG and PNG do not support layers, as they are primarily intended for final outputs rather than editable files. JPEG compresses the image, merging all layers into a single flat layer, while PNG, although better for transparency, still does not preserve layers. Saving as TIFF can retain some layer information but is less common for this purpose than the native PSD or PSB formats, which are specifically optimized for Photoshop's capabilities.