Headers and memory usage
------------------------
Dvips tries to avoid overflowing the printer's memory by splitting the
output files into "sections" (see the `-i' option in Note:Option
details). Therefore, for all header files, Dvips debits the printer
VM budget by some value. If the header file has, in its leading
commentary a line of the form
%%VMusage: MIN MAX
then MAX is used. If there is no `%%VMusage' line, then the size (in
bytes) of the header file is used as an approximation.
Illustrations (figure files) are also checked for `%%VMusage' line.