The Stop, Modify and Restart facility within DR. SPICE is used to stop a simulation that is currently running, modify any parameter within the circuit, and continue the simulation.
There are two ways to stop a simulation that is running. The first is through the Analysis=>Stop Running menu item. The second by hitting the F4 function key. Note that for simulations lasting a few seconds, you may not be able to stop the simulation.
Stop/Modify/Restart Dialog
| Button | Description |
| Cancel | Continue the simulation. |
| Abort | Abort the current simulation. |
| Resume | Continue the current simulation. |
| Modify, then Resume | Modify (alter) the circuit and re-run after the completion of the current simulation |
| Modify, then Restart | Modify (alter ) the circuit and re-run the simulation. The current simulation is aborted. |
| Re-select waveforms to view during simulation | Re-select marching waveforms before starting the simulation. |