Determine if the Document is Tagged-2
Reveal the Tags Panel
There are two ways to accomplish this:
Check Document Properties Tags
This option is the most efficient way to check for tags. Document Properties can also indicate if the PDF is tagged.
Anywhere on the PDF, right-click > Document Properties. Alternatively, on the keyboard:CTRL (for Windows) or CMD (for Mac) + DApplication - Source Document
To view the original program from which the document was created, look for "Application"; this displays the source program. In the following example, the original program used is Word. This information is very helpful, as we now know the PDF document can be easily converted into a Word doc, where all the accessibility principles can be applied in an environment that is far easier than in Adobe Acrobat Pro DC. Of course, this solution may not work for all documents.
Use the Tags Panel to view tags
Untagged PDF