SAOImage DS9 Version 6 New FeaturesVersion 6.0
Mosaics
The default load mosaic image mode is now WCS (previously, it was IRAF). IRAF mosaic images are now laid out base on the first segment loaded, just as with WCS mosaics.
Datacube
DS9 now supports FITS images up to 10 dimensions. If more than 3 dimensions of data are available, DS9 will display a modified datacube dialog which allow the user to select which values for each dimension to select the appropriate image to display. In addition, the user can specify which axis to be used as the current axis when stepping through the datacube.
RGB Frames
Contours are now implemented on a per channel basis. In addition, if a datacube is loaded, the current slice is also implemented on a per channel basis.
WCS CAR projection
DS9 will correctly display CAR projection grids for images which conform to the FITS WCS standard.
Analysis
Two new macros have been added: $filedialog(open) and $filedialog(save), which when invoked will display the standard open file or standard save file dialog box and return the selected filename.
I18N
DS9 will now search for environment variables LC_MESSAGES, LC_ALL, and LANG to determine the GUI language.
For more detailed information, Please see Release Notes