Joris Y.
I use plastic wallets (you know like the ones you use in school/college/work to keep papers) I usually put those on the wall with blue tack and put the pictures in them. Then I can move them around and leave them for a few days to make sure I'm 100% happy with how they look where they are or if after 2-3 days I think they would be better somewhere else.
Anika X.
i like to put them in places that are in a corner but very spacious and are even. i’m not sure if this will help lol sorry! 🙂
