The question is not how to hang it but Why are people still hanging it? Because Toilet Paper is obsolete. With modern plumbing we should be washing with water not smearing with wads of paper and the best way to do that is with a
Hand Bidet Sprayer. 10X cleaner than Toilet Paper, better than Wet Wipes(which are causing massive clogs) and even better than a Bidet because it requires no new plumbing, can fit in any size bathroom and actually does a better job cleaning you. See
bathroomsprayers.com.