[Zubersoft]

What kind of stylus are you using and what kind of device are you running MobileSheets on? Is the stylus a capactive or active stylus? If you are in the annotation editor, tap the three dots at the top right, then Settings and if you have stylus mode enabled, uncheck that. Now see if you can try with your stylus. If so, then your stylus is a capacitive stylus and cannot be used with stylus mode. A capacitive stylus works the same as a finger and is not nearly as accurate as an active stylus.

Mike