Key:		What the key does:

BkSp or <-	Pressing this key will back up one character in both the last 
		AND next command lines.
Del or Delete	This key is usually on the right side of the keyboard. 
		Pressing it will skip over (delete) one character in the last 
		command line, as a part of building the next command line. 
		However, no characters from that command line will actually be 
		copied to the next command line until F1, F2, or F3 is pressed.
Esc or Escape	Pressing the Esc or Escape key at any time will throw away the 
		partial next command line that had been built up to this point.
		It is a quick way to start over with a new (empty) command 
		line. The last command line is not affected by this key, and 
		is still available to copy from, using the F1, F2x and F3 
		function keys.
F1 or ->	Pressing this key will copy one character from the last 
		command line to the next command line.
F2x		This function key must be used along with some other key on 
		the keyboard to be effective. If "x" is a character in the 
		last command line, then pressing F2 followed by "x" will copy 
		characters in the last command line up to (but not including) 
		the "x" character into the next command line.
F3		Pressing this key will copy the rest of the last command line 
		to the next command line. If no other function keys have been 
		pressed, the entire last command line will be copied. If F2 or 
		F4 have been used to copy or skip part of the last command 
		line, the rest of the last command line (after the point 
		copied or skipped to) will be copied.
F4x		This function key must be used along with some other key on 
		the keyboard to be effective. If "x" is a character in the 
		last command line, then pressing F4 followed by "x" will skip 
		over any characters in the last command line before the "x" 
		character. However, nothing from the last command line will 
		actually be copied to the next command line until F1, F2, or 
		F3 is pressed. "x" is the first character that will be copied.
F5		Makes the "next" command line that has been built up using 
		the other function keys and keyboard entries become the "last" 
		command line, WITHOUT executing that command line. 
F6		Enters a Ctrl-Z in the next command line.
Ins or Insert	This key is usually on the right side of the keyboard. 
		Pressing it will allow the insertion of character(s) from the 
		keyboard into the next command line, along with characters 
		copied from the last command line. Pressing it again, or 
		pressing any of the function keys, will stop the insertion of 
		characters. 
