Under Bands in the Backstage, you manage every band that falls under your association — most associations have just one, but some run several (e.g. a main band alongside a youth or training band).
Each band has its own name and its own sheet music library. Members can belong to more than one band at once, and when browsing sheet music they can filter down to a single band (see My sheet music). Add a new band, rename one, or remove one you no longer need from this page.