muting instances/communities, community description to top of page

is it possible to mute instances or communities as opposed to straight up blocking them? making sure they dont show up on your /all/ page but not removing the ability to view any and all new content when its linked via different community

also, is it possible to move the community/magazine description to the top of the page rather than the bottom, as infinite scrolling makes it a bit tedious to unsubscribe or subscribe to communities