On the receiver there is: 

Polarization select—used to select normal or inverted polarity
Motor on—is used in conjunction to adjust the skew
Audio BW—used to select wide or narrow bandwidth
Select—used to select 6.8 MHz or audio tune mode
Audio up/down arrows—when in tune mode adjusts audio frequency

On the remote there is:

BW—same as audio BW on receiver
Pol—same as polarization select on receiver
Select—same as select on receiver
PS—parental supervision
Ant E and W—antenna east and west designed to work with the T2 Antenna Positioner