Depending on the venue and/or song, I sometimes like to have my PDf sheet music displayed so I can read the partition as it is scrolling, and sometimes I like to have the lyrics displayed. By default STxx will display PDf. So when I want to see my lyrics and chords I need to delete the pdf file and upload it again when I want it to be displayed on playback. Could there not be a way to select one or the other with a check box of some sort to provide more flexibility? Thank you!