obviously you don't have to do this but keeping it neat helps too, either as a collapsible menu (example: https://bigplace.dreamwidth.org/2528.html?thread=3040#cmt3040) or as replies with the canon as the subject to a top-level comment titled AUs

i've found that people in memes want to rp but they also don't want to waste their time. stating clearly that yes you are familiar with their canons and yes you're open to x, y and z has never hurt me. also if you have an au reference up act like your character belongs in their canon, reference their canon. people are more compelled to rp with others who are familiar with their canon, it's a compliment thing