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Use the simulation speed button to modify the playback speed of the simulation. Speed options are: 0.25x, 0.5x, 0.75x, Real Time (1x), 1.25x, 1.5x, 1.75x, 2x, 4x, and 8x.
Repeat
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The Enabling repeat button causes the simulation to play again from the beginning once it reaches the end, in a loop.