play/edit controls

the "Play/Edit Controls" are used to control playback and change parameters of the pattern view.

Play: plays from cursor position.
Stop: stops all playback.
Play from the beginning of this pattern: plays from the start of current pattern.
Repeat from the beginning of this pattern: repeats current pattern from its start.
Step one row: plays only the row at cursor position and moves down one.
Edit: toggles edit mode. when turned off, you won't be able to enter notes.
Metronome: toggles the metronome, which only works during playback.
Repeat pattern: toggles pattern repeat. during playback while this is on, the current pattern will play over and over instead of following the order list.
Poly: turns on polyphony for previewing notes. toggles to Mono for monophony (one note at a time only).
Octave: sets current input octave.
Step: sets edit step. if this is 1, entering a note or effect will move to the next row. if this is a larger number, rows will be skipped. if this is 0, the cursor will stay in place.
if clicked, Step becomes Coarse, which sets the number of rows moved with PgUp, PgDn, and related movement shortcuts. clicking again will revert it to Step.
Follow orders: if on, the selected order in the orders window will follow the song during playback.
Follow pattern: if on, the cursor will follow playback and the song will scroll by as it plays.