The GTK+ MB-System GUI consists of a toolbar at the top, a left pane for multibeam file names, and a right pane for data display.

The left pane displays a GTK liststore consisting of a checkbutton, file name and path, and format ID. If an individual file is loaded, it is automatically added to the list. The list can be saved and reloaded for future use. The saved file list is compatible with other MB-System commands such as mbset, mblist, etc.

The right pane displays the loaded data in a split screen. The top of the right pane displays a plan view of the loaded data. The bottom of the right pane displays the alongtrack profile view of the loaded data. The exaggeration of the alongtack profile can be increased by dragging the pane up.