Use your terminal's setup mode to synchronize the terminal with the color and key code definitions in its PROTERMCAP entry.

OpenEdge supports terminals based on definitions of their characteristics stored in a file called the PROTERMCAP file. The PROTERMCAP file supplied with OpenEdge has built-in definitions for many terminals. If your terminal is not included in the PROTERMCAP file supplied with OpenEdge, you must make modifications to that file. OpenEdge uses the shell variable or logical PROTERMCAP to find the PROTERMCAP file. By default, OpenEdge looks for this file whenever you start the software in a character environment.