How do I save presets in MIDI mode with Lex?

When in MIDI mode, the currently loaded settings can be saved to any of
Lex’s 300 preset locations at any time.

• To enter Save mode, press and hold BOTH footswitches. Both LEDs
  will blink GREEN to indicate that Lex is waiting to receive a MIDI
  Program Change message.
• To save the current state of the pedal to the currently loaded pre–
  set location, press and hold the SLOW/FAST footswitch until the LED
  lights BLUE

Another way to save presets in MIDI mode:

• To save the current state of the pedal to any preset location, send
  the unit a MIDI Program Change on Lex’s currently selected MIDI
  channel. For example:
• Send MIDI Program Change #10 to save the preset to the corre–
  sponding memory location on the pedal
• To recall this preset, send MIDI Program Change #10 from your
  MIDI controller or sequencer.