This first screen shows the editor editing some rooms using a template. The white fields are protected.
This shows split screen mode (PF2) which splits at the cursor. Default is back to the mudding mode. PF9 switches between screens. You can have up to 9 screens open. If you resize your screen mud should detect that from working Telnet client.
Edit command from mud mode brings up code window editing a method on an object. This is default editing with no template.