Notches on the sheet metal bending line

Hello

I'm looking for a macro to make a notch (triangular), a material removal, to help the folders to aim right.

I'd like to do something like this:

https://help.visiativ.com/mycadtools/2020/fr/Lesoptionsdedecoupe.html

A little angry with visiativ, no need to offer me to buy their whole pack for 2 interesting options... ;)

A+