doc-view-ghostscript-options

doc-view-ghostscript-options is a variable defined in `doc-view.el'.
Its value is

("-dSAFER" "-dNOPAUSE" "-sDEVICE=png16m" "-dTextAlphaBits=4" "-dBATCH" "-dGraphicsAlphaBits=4" "-dQUIET")

Documentation:
A list of options to give to ghostscript.

You can customize this variable.