Is there any way to enable commenting tools so they work within pdf form fields? I have created a pdf form, and as part of the review process (once the form is completed), other users need to be able to use commenting features on the text entered into the form fields (i.e. highlighting, strikethrough, etc.). I haven't found any way to do this within the fields themselves.
Acrobat can flatten all form fields / comments via Preflight (which lives in the Print Production tool pane) - select "single fixups" - the wrench icon - then type "flatten" in the search box to find the "Flatten all form fields" fixup, and run it.
You can also flatten everything via the JS console. Press Ctrl-J to open the console, clear it with the trash icon, enter the command this.flattenPages() and press ENTER.
If you want more control over what is flattened, we have a free add-on for Acrobat here.
Note that you cannot flatten a Reader-extended document, so you must first use the File > Save a Copy menu item to de-extend your form.
Once flattened it's no longer a form, so the field values become part of the page (and can receive annotation markup). However to allow markup in Reader, you will have to re-extend the PDF usage rights.