FV (May99) ftools.futils FV (May99) NAME fv -- Interactive FITS file viewer and editor USAGE fv [-cmap n] [filename] [filename] [...] DESCRIPTION This task is an interactive browser, editor, and viewer GUI for FITS files. With it you can view and modify FITS file headers, tables, and images in spreadsheet form. You can display images and plot columns from tables and dump the output to a Postscript file for printing. You can invoke fv by simply typing 'fv' at your command prompt. More information is available as online help by clicking with your mouse on the "Help" button visible in each window of the GUI. PARAMETERS filename If one or more filenames are specified on the command line for fv, it will start by opening that file rather than presenting a file chooser window. Since the default mode of fv is to open a file read/write, if you don't have write privilege on a file, you will need to start fv without arguments and check the 'Open file read only' box before proceeding. -cmap n On unix machines, fv can run in either pseudocolor or truecolor mode. By default it will choose the best available mode (n=0). You can force fv into truecolor mode by with n=2. With n=1, fv will try to install a private, pseudocolor colormap. BUGS POW, the image display tool used by fv, will try to allocate a portion of the current screen's colormap in pseudocolor mode. You may need to exit netscape (and similar high color usage applications) before displaying images in fv or you may not be able to read the buttons in the display window.