midi help pages

Newbie here! Just loaded a midi file and am interested in the controls I see. One section has 16 colored buttons and a SOLO and Mute button. Is there a writeup on what these do and how to use them? My midi file is a guitar and banjo duet and I am interested in muting or deleting one of the parts such as the banjo part so I can just hear the guitar. Any help would be greatly appreciated. I am using the latest version of Audacity for Win7.

See this page in the Audacity Manual: https://manual.audacityteam.org/man/note_tracks.html