Usage: sho [options] filenames[,dir#]
   [-ch #]          : display given channel numbers to rgba. Use comma separated
                      list (e.g. 0,1,2) or range delimited by colon (e.g. 0:2)
   [-dspy driver]   : output to specified display driver
   [-dspyfile file] : output to specified filename
   [-info]          : print basic image info, without showing
   [-sleep secs]    : sleep for the given # of seconds between images
   [-native]        : do not convert to 8-bit before showing
   [-urlscheme]     : remove URL scheme prefix from filename
   [-h]             : provide usage information
   [-v]             : provide version information
   [-verbose]       : print name and size when displayed
   [-formats]       : provide file format information
 
 Supported formats:
   TIFF, OpenEXR, JPEG,
   SGI, TGA, MayaIFF,
   DPX, PIC, BMP, HDR,
   PNG, GIF, PPM, XPM,
   Pixar TEX, Z-file, & deepshad