Toggles the screen output produced by single-line stepping, between leaving the Editor prompt on screen after each line and overwriting it with the next line.
Q
The Editor displays the message Q on
or Q off
to indicate
its present state. On initial entry, the default is off; that is, the Editor
prompt is overwritten.
:ED FILE1 NAMES Top 001 DAVE 002 JOHN 003 FRED E01 003 .Q Q on . 001 DAVE . 002 JOHN . 003 FRED E01 003 .Q Q off .EX
Note: RETURN is pressed at the end of each line.