Once a Reference Map is defined for the Magnetic Field Extrapolation Project, the user has the following options to add an arbirary number of maps to the project:

1. Add MAP from FITS file to the project
2. Add MAP structure from IDL file to the project
3. ADD THIS MAP TO THE PROJECT (this button adds the currently displayed map to the project)

When added to the project, the original maps are first differentially rotated to the time frame of the reference map, cut to the field of view of the reference map, and rebinned to the same resolution as the reference map.