To Use the Drag-and-Drop Operation to Select Models for Batch Processing from Models Dialog

Select File > Tools > Batch Process .

In either the open DGN file or from a second session of MicroStation, open the Models dialog.

Do one of the following:

In the Models dialog, select the model that you want to process.

or

Press and hold down the <Ctrl> key, then select multiple models.

Drag the selected files to the Process Tasks list in the Batch Process dialog, releasing the <Ctrl> key to complete the task.

If you want the files to be dropped between two existing processing tasks, position the pointer between them prior to dropping the files.