An event can be added by using the COPY button. Pressing and holding COPY opens a display that says INSERT NOTE AT 001/00. Pressing the RECORD button would insert C3, a velocity of 64, and a duration of 1 beat. You could then change these values by using the EDIT feature and editing this event.
If you would like to insert an event other than a NOTE. you can do this by Holding the COPY button and using the pge up and down buttons to choose different events.