1. In the Project window, create a MIDI track for each instrument.

    You can prepare a piano (split) staff from a single track, i. e. there is no need to create one track for the bass clef and one for the treble clef.

  2. Name each track after the instrument.

    This name can later be used in the score if you like.

  3. Record on the tracks or create empty parts on all tracks.

    You can make very long parts that cover the entire project, or you can start out with shorter parts to begin with. If you choose the latter option, you can always go back later and add new parts or copy existing parts.