To define remote events on the dashboard, please visit Notifications tab and select the room in which you want to attach an event. Such type of events can be monitored in either foreground or background mode as it's included in Remote defined events section.
In the case of custom events (defined in your application), you have to add them manually and attach custom listener. These events can be circles or polygons. More information you can find under Custom defined events section.
In case of any questions, feel free to ask :)