I have a question about “Invoice Fields”
I set a new Field Label “LZeitraum”
If I create a new Invoice I can see this Label “LZeitraum” on top.
I changed code in custom invoice design and set variable $LZeitraum but nothing changed.
I tried to set variable as $LZeitraumValue but it did not help.
Which variable should I use in code?
Is it currently possible to manually add “invoice custom fields” in a custom design?
If yes, What’s the name of variable? I didn’t find their in database, only the labels name.