[Zubersoft]

No, they are not stored in the PDF by default. They are stored in the MobileSheets database. However, when users export their PDFs with annotations embedded in them, they expect those annotations to show exactly like they appear in MobileSheets, and I try to allow those annotations to be embedded in a state where they can be edited later if needed. If I embed just an image of an annotation, it's basically uneditable at that point. 

Mike