There are a few limitations when exporting or saving a Sketchbook file to the PSD file format.
- Text layers will be rasterized and no longer editable by a text editor
- Glow blend modes (Glow and Soft Glow) that are proprietary to Sketchbook will revert to Normal
- Background layer color will revert to white, if it has been changed to another color. The background color layer is dropped to avoid a conflict with the background layer of a native PSD file.
The native file format of Sketchbook and Sketchbook Pro is TIFF. If the above features are necessary to preserve, you should save your file as TIFF.