We use Advanced PDF/HTML templates, but I've never personally done any customization. If a specific bank account for one of our subsidiaries needs to have a custom check layout, how do I make sure that check layout applies? I can figure out how to customize the form, but don't see how I can apply it to the legal entity or account or whatever I'm supposed to do.

i think you would need some kind of #if statement in the advanced PDF code based on the bank account