You can use the
(Loop) tool on the Replay toolbar to replay the simulation in continuous repeat mode. When it reaches the last timestep, the simulation will loop back to the first timestep and continue without a break.
You could use this facility to repeatedly view all of the simulation, or perhaps a small section of the simulation (see Replaying part of a simulation).
To stop the continuous repeat replay, use the
(Pause) tool. You can then restart if necessary with the
(Loop) tool or the
(Play) tool.