Showing simultaneous movement requires the use of a Transport and/or Convey Item block from the Item library (included in ExtendSim DE and ExtendSim Pro). To animate the simultaneous movement of items through a model, follow these steps:

1. Place a Transport or Convey Item block at the point in the model where you want a transit time. A transit time is required to show simultaneous movement, otherwise the movement would have no duration.
2. Open the block's dialog. On the Transport Animation tab of the Transport and/or Convey Item block, check the "2D animation shows simultaneous movement" option. Tip: Use the Find and Replace block from the Utilities library to change all of the blocks at once.
3. Select "in a straight line" or "along connections" for the movement.
4. Turn off "Add Connection Line Animation" from the Run menu.