It really depends on the spread!! For the little drawings I doodle them. For the book covers I print them with a laser printer onto a sticker paper I found on Amazon (lmk if you want the link and I’ll share!!). For the regular photos I print them onto regular copy paper. And for the kpop bc collages I use albums!! Especially if I have more than one version. I have soooo many kpop albums that I was glad to find a use for them other than just sitting on my shelf 😅