just hold a chord and play the strum keys and listen for which is which). (That is really important, I don't remember which is which, and always confirm when I use it. I think the low and hi C and D notes are the strum keys. I play most 'first stums' live (piano style), and then I'll add strumming keys later for any chord I need (those strumming 'repeater' keys sound amazing), and I'll usually remember to hold down those notes I intend to strum later, adding the strum key notes in the editor (they will re-strum all last notes played or currently active). But first, I'll just play the piece in by hand (because a live feel is paramount for realism). The preset function keys which are above and below the playable range are important (they are preset as 'strum' and 'muted string strum'). I use whatever the function is that it opens with (maybe it's called 'solo and strum', or whatever), then load the nylon, and start playing it. Personally, I don't go that deep into RealGuitar (RG). I actually find the nylon finger-picked instrument to be the most amazing, and worth the cost of the entire program alone!

Realguitar musiclab system requirements