The user interface consists of a map view, a text view and the usual menubar, toolbars and statusbar. The map view can be hidden to give more room for the text view, and the text view can be hidden to give more room for the map view. It is possible to show Asimulator in fullscreen. It is also possible to detach the map view or text view to show it alone in a separate window (which can be set to fullscreen by the window manager).

The gridlines between the tiles can be set to different thicknesses or not displayed at all. Coordinate numbers can be shown in the border columns. It is possible to switch between showing global coordinates and coordinates relative to the agent begin location (the kind of coordinates that the agents knows about).

The colors for the different tile types, gridlines, the coordinates and the map background can be adjusted in the configure dialog. (The map background is only visible when the map view is larger than the map or the option Show only known tiles while simulating is turned on.)

The text view shows messages, for example