This week's new feature series is a tutorial on how to use the new coordinate system dialogs in MapViewer 8! If you've used Surfer 12, Didger 5, or Strater 4, the Assign Coordinate System dialog may look familiar, only with a few new perks added! In MapViewer 7, you could access the Map Projection options dialog by clicking the Map | Convert Projection, Map | Calibration, or Tools | Reproject Data File commands, or when importing or creating a map using files with an unknown projection. In MapViewer 8, the Assign Coordinate System dialog can also be accessed from several different places. Most often, the dialog will be accessed by clicking the Change button on the Coordinate System page of the Property Manager. However, this dialog may also be accessed by clicking the Map | Plot | Calibrate command, when adjusting the input or output coordinate system when reprojecting data files with the Home | Data | Reproject Data File(s) commands, or when importing or creating a map using files with an unknown projection.