You will need to be under board level settings to make these selections. If you need to add multiple SHSM codes to your SHSM categories

Main menu>setup>graduation requirements>SHSM categories> go

Click on the categories you wish to edit

Click on the codes and type in the next code you wish to enter, place a checkmark in the code, enter your next code and so on.

The changes will save automatically, this will not be sent to the notification bell and will not enable the save function on the screen.