I've managed to import PDF charts into FI (unfortunately one at a time), but when ever you click on the virtual cockpit, they become transparent.
I am trying to position them above the yoke (where they would clip on), but as they become transparent, they become very difficult to read.
Another problem is that the resolution is really bad, so that when I use the zoom function to read smaller writing, the res is so blocky that it is almost impossible to read (the imported charts are A4 size pdfs, which are fine when viewed on the desktop).