fv [http://heasarc.gsfc.nasa.gov/docs/software/ftools/fv/] is an editor for image files in [FITS] format. fv 4.4 uses Tcl/Tk, Tix, itcl/itk/iwidgets, pgplot, [fitsTcl], and other dependencies. fv is supplied as a standalone binary; however if the correct components are built and installed, it can be run as a Tcl/Tk script in an ordinary Wish interpreter. These components include the standard extensions Itcl, Itk, Iwidgets, Tix, tclreadline, pgplot, plt and pow, and the specialist extensions tclxpa and [fitsTcl] that are provided with fv itself. [ds9] can be used as the display for fv: start ds9 and select it as the "Display Device" from fv's main menu. ---- [Category Application] - [Category Graphics] - [Category Image Processing] - [Category (L)GPL Licensed]