The following real-time commands control the MicronEye while using the GREYPIC program:

• < -- Decrease exposure time (comma also works).
• > -- Increase exposure time (period also works).
• C -- Clear entire screen.
• 1 -- Use upper third of screen to display picture on.
• 2 -- Use middle third of screen to display picture on.
• 3 -- Use bottom third of screen to display picture on.
• N -- Rollup screen. (Middle third of screen moves to upper third, bottom third moves to middle third, and bottom third of screen is cleared. When using this option, it is best to be displaying the picture in the bottom third of the screen.) By using this command and the 1, 2, and 3 commands the user can piece together a picture of any length.
• E -- Display the current exposure time and change the exposure time to a new value.
• L -- Use current exposure setting as the lowest exposure setting when creating a gray-scaled picture.
• H -- Use current exposure setting as the highest exposure setting when creating a gray-scaled picture.
• B -- Bracket the exposure range for a gray-scaled picture. (User will be prompted for a high and a low setting.)
• P -- Create a gray-scaled picture using the current high and low exposure settings, and print the picture on the Epson. (Seven intermediate exposure levels are used in addition to the high and low values to create a picture with nine levels of grey.)
• S -- Save a gray-scaled picture to disk rather than print it.
• R -- Recall a gray-scaled picture from disk and print it.
• D -- dump (BSAVE) entire hi-res screen to disk.
• G -- get previously BSAVE'D hi-res screen from disk and display it.
• Q -- Exit-program.

The GREYPIC program is easily modified to create images with up to 256 levels of grey. Although your computer has no means of displaying this many levels of grey, there are some rather expensive devices available for displaying and printing such images.

Here's the BASIC GREYPIC SOURCE CODE