You can save the connected cell selection to a new raster file. This allows you to create a new raster that contains what you have previously selected.
- Click the Cell Selection menu on the ArcScan toolbar.
- Click Save Selection As.
- Click the Save as type drop-down arrow.
- Choose a raster format.
- Navigate to the folder in which you want to save the raster.
- Type a filename.
- Click Save.