This dialog box is likely used to define and manage units of measurement within a software program. It allows users to create custom units by entering a symbol, a formal name, and a conversion factor . The conversion factor is likely a numerical value that specifies how the new unit relates to a standard unit of measurement.

For instance, if you were working with a program that tracks inventory, you might create a new unit called “PCS” for “pieces”. You could then define a conversion factor of 1, so that 1 PCS would be equivalent to 1 unit of the program’s default unit (e.g., 1 box, 1 meter, etc.).

The dialog box also includes buttons for creating new units (“New”), saving changes to existing units (“Save”), and deleting units (“Delete”).