You can use a macro to change the dimensions (rows and columns) of an Open Systems display.
If you prefer to run macros in pre-configured sessions instead of creating your own sessions, you can download the VBA Sample Sessions and open the change-display-when-certain-strings-are-received.rdox (Open Systems) file. The download package contains everything you need to run the macros in this file. See Download the VBA Sample Sessions.
You can run this macro automatically when certain strings are returned by the host or when specific events occur (see Navigating Through Open Systems Sessions and Using Reflection Events).
This sample applies only to Open Systems terminals.
Sub ChangeDisplay() 'Set the number of rows and columns ThisScreen.DisplayColumns = 100 ThisScreen.DisplayRows = 40 End Sub