Two pedals.
On most songs (registrations ala Yamaha): Pedal 1 is Sustain. Pedal 2 is Fill to Self
On a registration when a "Glide" is needed such as Pedal Steel, Aloha Guitar, Trombone, etc, Pedal 1 is assigned to Glide.
On registrations when vocal harmony needs to be turned on and off within the registration, Pedal 2 if Vocal Harmony.
On many song registrations the two pedals often 4 (sometimes more) functions.
Then there are the jobs where less is more and the pedals stay in the gig bag.
Eddie