How does one get to the start codes?

[BTL2021 0]

 

I am new to CURA.

It is easy to get to the start codes on Creality Slicer.

I am trying to fix an issue with Ender 3D PRO, upgraded to 4.2.7, and BL Touch.

Marlin recommends adding some lines to the start code, but I can't seem to find how to access it in CURA.

[GregValiant 1,351]

In the Prepare screen - click on your printer name, then Manage Printers and then Machine Settings.  Start and end gcodes are at the bottom.  I usually have to stretch the dialog box vertically so I can see it all.