What is the best way to create PDFs so that customers can download the file and edit the text that is specific to them (date, names etc), while maintaining fonts and sizes as well as the format and layout. I'm trying to create a digital download to sell on Etsy, specifically a party invitations, and I'd like to be able to create these files on Illustrator or InDesign or another software that gives me extreme control over the formatting and details.
I realize this has been asked before but it seems medieval that Illustrator or InDesign do not offer a better way to do this, without having to replace and reformat my text in Adobe Acrobat Pro.
Any tips? I've scoured the internet for more info on this to not much avail :(