[Motorola] help wanted with R2400A Service Monitor

[JEFFREY MICHAEL KENYON]

Good afternoon everyone. I am trying to learn this R2400A Service Monitor
here, but I have a few questions.  My first  question i how do I change the
frequency of the tones that it is outputting?  Also, how do I bring the
display  into  focus?  
	I am also wondering if there is any way of just searching through
a band of frequencies?  When you reply to me let me know of the switches
or keys you are referring to, because I am blind and can't read what the
names of the keys are or switches.  The reason why I want to bring the
focus in on the display is so I can demonstrate to some sighted people
what this big machine does while I have it here at the house.  Any help
would be appreciated, and thanks in advance.