Adding permanent info to invoices

how can i add to bits of info to the invoice and would appear on every invoice, without using customs fields.

Also how can i put the quantity in letters in the lowest part of the invoice

How did you do it what’s showing on the screenshot? And you ask for quantity in letters but that’s not within the red box you drew.

1st red box: custom field.
2nd red box: footer for invoices.
Both can be entered in Form defaults.

I put two custom fields that how i input those two things, how can i make them appear as form defaults?

sorry i already found it, thanks