I am not able to delete an individual sketch (Annotation). When I use the delete button on my keyboard to delete a sketch, I get a pop up saying "Your request could not be completed because you have signed out". This happens every single time. At first I thought it could be a permission related issue but I am using the system as admin who has the complete access.
This forum is dedicated to Adobe Marketing Cloud, specifically Activation - Dynamic Tag Management. For assistance with the sketch feature in Acrobat you will want to reach out to the Acrobat Community here: https://forums.adobe.com/community/acrobat