"Preset buttons" refer to pre-programmed buttons on a device that allow you to quickly access specific functions or settings without needing to manually adjust them each time. Full definition
BMW also allows you to select each of these settings and then save them in two all - encompassing modes you can activate using preset buttons on the steering wheel, marked M1 and M2. (cars.com)
In this car, the radio has a small monochrome screen with buttons scattered around its display, and a row of preset buttons lower on the center stack with knobs for the volume and radio tuning. (automobilemag.com)
As XAPPmedia CEO Pat Higbie pointed out during a recent The Voicebot Podcast episode, smart speakers are bringing back the radio preset buttons of the past: (voicebot.ai)