A frequency band the scroll sweeps; every section is a stop on it.

The sections are stops on a tuning band under a fixed needle; scrolling sweeps the band, the stop in tune is the one you read, and between stops there is static. Reach for it when the sections are STATIONS — things a reader picks between rather than reads in order: channels, modes, plans. Orbit says these return; reel says and then; dial says pick one.