An already imported map, whether or not is a photospheric magnetic field map, may be used to create an Extrapolation Project Reference Map by following these steps:

1. Select the desired field of view FOV either by directly typing into the XRANGE and YRANGE numerical imput fields, or by using the mouse tool for zoomin into the original map, if necessary, followed by pushing the GET FOV FROM CURRENT MAPbutton.
2. If needed, change the original map resolution to a desired figure using the dx and dy numerical input fields.
3. Push the CREATE REFERENCE MAP button to validate the selected FOV and Resolution and create a Reference Map that is added on top of the Project Map List .