Merges the files onto one page, in 'C' columns and 'R' rows. The CxR files are given in the order of words on a page. The page is presumed to be 8.5x11in in size, as are all the input files, and the input files are sized to fit, and kept in natural scale.
Where `enlarge' is a scale factor applied after offsetting `xcm' to the right and `ycm' upward.
produces 4 panels from gri plots done using margins and sizes as specified in the following lines in a gri commandfile
The OPTIONS, available if your 'perl' has 'getopts' library, are:
-u graylevel -- set graylevel for underlay beneath panels, by default 0.75.
-b graylevel -- Set value for background under individual panels, again 0