I'm using Acrobat Pro XI on a Macbook Pro, OS 10.9.5. As a proofreader/copy editor, I primarily use the highlight and sticky tools. A few days ago the type in my comments became extremely small, even though I hadn't made any (intentional) changes. I've set the preferences to 18 and then 20 point, but the font doesn't change and is still much too small. (I also noted in a support document that Mac users are not supposed to be able to set point sizes, only to small, medium, or large—but I don't have those options.) I upgraded from X to XI in an attempt to fix this, but nothing changed. When I go to the Content Editing box, "Edit Text & Images" is grayed out. I can make changes in the "Add Text" box, but I don't use that tool. I'm getting just a wee bit frantic (yes, the smoke is because my hair is on fire), because the majority of my jobs are PDFs, and now I can't work on them.
I'm certain that this is simply a case of DO (dumb operator), but I'd appreciate it if someone can get me on track. Thanks.