The Display Units dialog defines and edits any number of displays that your program may run on. You can add a new entry to the list provided by entering the name of the device (it must be unique otherwise an existing entry will be selected), and pressing the Enter key. A message box will notify that you are adding a new entry.
After clearing the previous values from the entry fields, you can enter the values for the device. The utility DFM.Exe determines the specific factor for a given display type and resolution. This utility is found within your IRE subdirectory and can be run from any OS/2 2.x compatible system. It displays the current resolution, colors and factors within a small message window.
The Defaults push button determines the values for the device you are currently using and enters them into the entry fields for you.