Image display tool for astronomy (help files/documentation)

 SAOImage DS9 is an astronomical imaging and data visualization
 application. DS9 supports FITS images and binary tables, multiple frame
 buffers, region manipulation, and many scale algorithms and colormaps. It
 provides for easy communication with external analysis tasks and is highly
 configurable and extensible via XPA and SAMP.
 .
 This package contains the documentation and help pages.