There are several methods to change the register values manually - using the keyboard.

You may use the SET command:

	>SET SPEED 1200		(SPEED is the name of the register)

You may use the LET command:

	>LET SPEED=3*SET1	(SPPED and SET1 are rgister names)

If the register has "operator access" (i.e : you can highlight it using the TAB key), then you may select it, by pressing the TAB key until it is highlighted, then enter a value or an expression.
	>1200
or
	>(2*SET1)

On point definition pages, the values always have operator access and may be selected using the TAB key.

If a register is selected, the F7 key decrements it, the F8 key increments it.

If a binary register (I or O is selected), the F7 and F8 keys toggle its value.

Note that "NUM LOCK" allows you to enter values using the numeric keypad.