Bank editor → Emulator
Select
Presets
Algo
Knob 1
Knob 2
Knob 3
Knob 4

Z–' Q–0 keys  |  turn the knobs: drag, scroll or ←→↑↓  |  [ ] octave  |  a MIDI keyboard works too  |  click ▶ Start audio first
Link FM-1 (an FM-1 on USB): the sim shows the FM-1's sound and its knobs edit it; the keys play the FM-1; PRESETS changes the FM-1's program. Every page at once: the Bank editor.