Nano newbie question about editing presets

Hi everyone,
I suppose this is quite trivial but I want to be sure: I understand that the only way to edit presets is load them (or create them) in one of the four slots of the Nano. Is it right?
Thanks in advance for your attention.

The Nano can hold up to 128 presets. If you select any of the 128 presets the preset is loaded into memory and can be edited using the phone app or turning the knobs on the actual pedal.

The footswitches can be programmed to select 4 of the 128 presets. So it’s not preset memory slots rather something similar to preset bookmarks.

If you have the need to select more presets than just 4 without using the phone application you need to use midi pedal or similar to send program change messages to the pedal for