Actually I see the chords in full screen. If I choose the Notation item and choose the 6th item (in French Mode affichage propre), I see now a 2 lines score, the first one is the melody (sax tenor), the second below with a F key completely empty.
When I try to make a video, it is this screen that is choosed by the program and I don't know how to modifify this screen. First, no second line, then get more lines with the sax tenor melody.
Difficult to explain because I'm a newbie, and more difficult, a French one !
Thank you