The dbxtra interface
When invoked, dbxtra has a source window on top of
an interaction window.

Figure 6-2 dbxtra interface
dbxtra is, by default, in screen mode as shown in Figure 6-2, ``dbxtra interface''. It provides automatic segregation of the relevant debugging information into separate windows, or regions of the screen. As well, dbxtra's screen mode has a configurable keyboard interface that lets users perform cursor movements, text scrolling, and command editing with a single keystroke.
dbxtra also has a line mode, which disables all screen functions as well as the configurable keyboard interface. It is invoked by specifying dbxtra with the -s option. The document focuses on dbxtra's screen mode.