Here's some other cool stuff about the modern F1 wheel and it's many knobs, as described by Sauber.
Following are the controls most used by the drivers during a race:
➡ Shifting levers
➡ KERS boost
➡ DRS
➡ RPM / Fuel / Pedal
➡ Radio (R)
Some additional information:
➡ Average number of shifting events per race (all races): 2750
➡ Grand Prix with the highest number of shifting events per lap and per race: Singapore (70 per lap, approx. 4’270 in total)
➡ Grand Prix with the least shifting events per race: Belgium (1’980 in total; 44 per lap)
➡ Grand Prix with the least shifting events per lap: Brazil (36 per lap, 2556 in total)
➡ Average KERS boost button usage: 4x per lap, >220x per race
➡ Average use of team radio: <1x lap="" per="">30x per race1x>