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You can control a simulation from the SimMechanics visualization window with the pair of simulation control buttons. The pair takes two different appearances, depending on whether the simulation is running.
From left to right, the buttons are Start and Stop,
with Stop disabled:
.
From left to right, the buttons are Pause and Stop:
.
If you pause a running simulation, restarting it begins the simulation at the simulated time when it was stopped.
If you stop a running simulation, restarting it begins the simulation at a simulated time of zero.
Once you start the simulation, you can track the simulation time at the lower right of the visualization window, in the status bar, if the simulation time display is active.
Simulation Time Display (Robot Arm Simulation with Visualized Body CSs and CGs Deactivated)

You can activate or deactivate the simulation time display using the Display Simulation Time button on the toolbar. The default is active.
![]() | Communicating with the Model from the Visualization Window | Controlling Animation | ![]() |

Learn more about Simulink through this collection of videos, articles, technical literature and the Getting Started with Simulink Guide.
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