having all sorts of plates, textual descriptions and airport diagrams available at your fingertips is quite great without the need to print them out. However, they're very difficult to find again on a tablet computer, especially in flight. Is there a way to open (and keep open) a list of documents in a definable order? It's really hard to open the PDFs (which occasionally terminate SDs logging too)  at the appropriate phase of flight. 

Ideally, in the pre-flight phase I'd like to identify and have readily available all documents that I'd have to reference during the flight, from the SID to the approach plate and airport diagrams. Also the filters don't always appear to work - take EDDH as an example, filtered for DEP R33 the SIDs for 15, 05 and 23 are still listed amongst a total of close to 60 documents and require scrolling across. As of yet I haven't found an efficient way of locating the document I require whilst in flight (when your IQ has dropped 40 points anyway).