I would like to be able to compose my own notes and chords on the keyboard without recording it by audio record. It would just be basic chords for the song I am working on, but I can't seem to remember how to get to that option. Please help!
Assuming you are using a version of MMM with this feature (you didn't say), one would use the Vita MIDI editor to create their own loops. You have a wide variety of instruments to choose from. In MM-15 you will find it under the Synthesizer tab.