1 FILE_EXTENSIONS
	
	Controls the default file extensions for Read/Write menu.

2 MAPFIL$EXTS1
	UV table file extension. Default UVT

2 MAPFIL$EXTS2
	Dirty map file extension. Default LMV

2 MAPFIL$EXTS3
	Dirty beam file extension. Default BEAM

2 MAPFIL$EXTS4
	Primary beam file extension. Default LOBE

2 MAPFIL$EXTS5
	Clean map file extension. Default LMV-CLEAN.  Recommended value
	is LMV-SKY for Mosaics (to indicate that primary beam correction
	has been applied).