I'm trying to switch the PID number with DI input but it's not working correctly. To check, I'm looking at the green numbers in the upper left of the SP display.

The green numbers in the upper left part of the SP display are the SP numbers.
If you register PID numbers in the select screen, you can display them in the SP display area (in orange).
Register PIDN_L1_1 under Setup parameters > CSEL > CS1.