I thought of a situation that I'm not clear of for the mastery pages in League of Legends.
I have multiple mastery pages, for different types of champs (one for tanks, one for mages, one for support, etc. etc.).
But what I've noticed is depending on which champion I use of a certain type (one mage vs. another, etc) I may use different summoner spells, which means I occasionally might want to swap 1 mastery point in favor of a mastery supporting my summoner skill(s). It doesn't seem worth having a whole separate page based on each setup of summoner skills, especially since I then have to remember which one is "Mastery Page 4", for instance.
You can edit your mastery pages once you're at the champion select screen, however. But in most cases I don't want to make permanent changes and save them, because I prefer the original page. Is there a way to change your mastery page for the CURRENT MATCH, such that it resets to the original on subsequent matches?