Taking a snapshot of a simulation run is presently the only way to start an EMTDC simulation from an initialized condition. See Initialization and Initial Conditions in the EMTDC manual for more details on snapshot files.
You can take a snapshot manually by pressing the Snapshot button in the Home tab of the ribbon control bar.
Pre-defined snapshots are set before the run is started. There are a couple of different snapshots of this type available.
Open the Project Settings dialog window as described in Editing Project Settings above. In the Runtime section of the dialog, choose the snapshot type from the Timed Snapshot(s) drop list.
Enter a name for the snapshot file in the Snapshot file field, and the exact time at which to take the snapshot during the next run in the Time field.
Click the OK button to exit the Project Settings dialog and save changes. Run the project to completion.
NOTE: Make sure that the run duration is greater than the snapshot time, or no snapshot file will be created!