You can start or stop the run of a simulation by clicking over the Start/Stop button (as shown in the following image) .
Start/Stop: This toggle button allows you to choose one from two predefined options (Start and Stop). The icon of which changes with each click and cycles between two states; the currently displayed value presents the next state.
Before you run the simulation, you may need to alter the default simulation setting to what fits the application of your project exercise (Simulation Parameters are discussed in the next section "Parameters Group").
