Cyan jacks are outputs, violet jacks are inputs. Drag between them to patch. Click the dot on a cable for its attenuverter, double-click the dot (or click the cable itself) to remove it.
Commands (type into the field by the scope, or use the keyboard on desktop): 1-0 play a preset, ed3 arm/exit edit mode on preset 3, xy toggle the Lissajous scope, rd randomize, xprt start/stop recording, n3name name preset 3.