I exported an interactive PDF from InDesign CS5. This file makes extensive use of buttons, which appear as "form fields" when I "Examine Document" in Reader Pro 9.4.0.
The problem is: when there are 101 or more form fields in a PDF, reader prompts users upon opening to "Please fill out the following form. [etc.]" even though the form fields are not ones that the user can fill-out (they are interactive show/hide objects). It does NOT act this way if there are 100 or fewer form fields.
Is there any way around this? By prompting users to fill out the form, it implies to them that there is something to fill out when there isn't, and it will feel broken.
If all you have are buttons, then you can safely apply document security and set the permissions to not allow filling form fields. The buttons will still work, but users won't get the forms message bar.
There doesn't appear to be any way to restrict filling out form fields without also shutting down their ability to add comments. Is that correct?
Yes, that's correct.