There is a link at the end of the post for the whole pdf.
This is from page 6 of the pdf for Marcum
Adjusting the Monitor Settings
The VS385 monitor has four different adjustments that can be made to
enhance the image on the monitor to the user’s preference. (Note: The VS385
has been pre-set with factory defaults for normal viewing.) To access the
settings menu, press the menu key on the digital keypad. The settings menu
will be displayed on the screen (note: if you wait too long before selecting an
adjustment, the menu screen will time out and disappear). To change between
on-screen adjustment choices (brightness, contrast, color, and sharpness),
continue to press the menu key. The selected on-screen adjustment will
be highlighted on the LCD screen. To change the settings within a selected
menu, use the UP and DOWN arrows located on the far right of the digital
keypad. You will see the numbers of the selected adjustment increase or
decrease depending on the arrow direction you are depressing. To accept
the changes, release the UP / DOWN arrow and settings will be saved. Once
the settings are adjusted properly, the on-screen menu will shut off automatically.
Occasionally, you may find that one of your settings will not adjust. By
simply scrolling through the menu options and coming back to the setting that
wouldn’t adjust a second time, you will automatically reset the internal timer,
enabling that setting to be adjusted.
https://marcum.custhelp.com/ci/fattach/ ... 85-v86.pdf