a large network of elements and will become too cluttered if displayed as a whole in another mode of operation the user may right click the mouse on a node and choose to expand every outgoing elements recursively to the maximum depth not just the first level fig4 is a flowchart of image frame processing operation 400 operation 400 first looks for certain conditions that require special processing when all conditions have been handled the next available image frame is rendered first stage 405 determines whether the active stream is set to a run state if the stream state is not set to run image playback is paused and operation 400 terminates next stage 410 determines whether the current frame is close to a hotspot proximity is determined either with respect to a number of frames or to a time delta if the test is true in stage 415 the hotspot is activated e g by highlighting the hotspot icon in map view window 1120 and alerting the user to the proximity of the hotspot via a visual and or auditory queue stage 420 then determines whether the current frame is at the end of the current branch proximity is again determined either with respect.