Merge two PDF/Text files

I’m trying to merge two PDF+Text files in DTh4, but the merge option in the Tools dropdown is grayed out after I select the two files. Am I doing something wrong?

Thanks

Welcome @beckham

Look at the right side of the Navigation bar over the view/edit pane.
image

Do any of the PDFs have a lock (locked permissions), key (encrypted), or slashed pencil (read-only) icon?

No, there’s no lock, key, or slashed pencil there.

Any other ideas for me?

Open a support ticket and attach a screencast of the behavior.