What method are you using to upload? Copy/Paste? You cannot drag and drop a word file onto the VTT, and although I have heard it is possible to drag a PDF onto the table top, it will simply convert it to an image. You should be able to copy and paste text however. If it has very complicated formatting, or the text is discontinuous (common in PDFs) you may get undesired results even with copy/paste. You can try pasting as Plain Text, which will remove all formatting. The keyboard command may vary from system to system, but Cntrl/Cmd-Shift-V should do it. Let me know if any of this helps. If not, let me know that too. :)