How do I display a table in DS9?
DS9 has limited support for plotting data from tables, using either the --prism command-line option or by selecting the menu item "File" → "Prism".
As an example:
unix% ds9 -prism arf.fits
will create a window similar to
Colums can be plotted from this window: for example, the SPECRESP column can be plotted as a function of ENERG_LO: