Uhm like when you go to write on someones wall, theres a little button that kind of looks like a medal and you click that and then you can choose for what youd like to give that person props :) lol hope i helped you if thats what you were asking for <3
you go onto somebodys profile you click on there wall it says wright on wall you write on it and then you click on props and post it and they might give you props back hopes this helps!
