Marking a song's type, and what it changes.
Mark a song as an original or a cover when you add it. The distinction is quiet but it earns its keep in two places.
That is the whole feature. No drama, just bookkeeping that quietly does the right thing later.
Setcraft is a Mac app for working musicians: build setlists, print them big enough to read from the kit, and keep every song your band plays in one place. Download it free for 30 days.