When you use video help, your screen displays the help text
       according to the help settings in effect during your DEC
       DATATRIEVE session. You can see what these settings are by
       entering SHOW HELP at the DTR> prompt. You can change the way
       the help text appears on your screen with the SET command. See
       the SET HELP command for more information.

       When the default help settings are in effect, you can scan the
       help text using the following keys:

       up arrow       scrolls the help text backward to previous lines.
       down arrow     scrolls the help text forward.
       left arrow     turns back a "page."
       right arrow    turns forward a "page."
       CTRL/W         repaints the part of your screen used for help.

       If you have prompting turned on, you will see the help prompt for
       "Topic?" or "... subtopic?". When the prompt appears, you can do
       several things. Enter the following:

       RETURN         takes you to the next higher level of the help.
                      For example, if the prompt is "DEFINE subtopic?",
                      the next prompt will be "Topic?". If you are at
                      the "Topic?" prompt, pressing RETURN exits to
                      DTR>.
       CTRL/Z         exits from help. You will be at the DTR> prompt.
       topic          the name of a topic. The help on that topic or
                      subtopic will be displayed.
       ?              Will display the current help again.
       *              Will display all the sub-topics of the current
                      topic.