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It's documented in the DEV Template. I use a feedback timeout that is default 0 ms from every case but the Timeout case (which feeds back -1). This makes the Timeout case execute exactly once after the event queue is empty. Use a "Display needs update" boolean flag to record if the display needs updating in the timeout case. One can do this with Queues as well. With this one is able to look at all incoming data, but do expensive display operations only as often as possible (but as quickly as possible). So you could, for example, have information coming in a 100 a second, and display using fancy techniques (like complex 2D pictures) that take 100ms+. This is more responsive and a look more robust than the "drop old stuff" technique.