ps_setgray Sets gray value &reftitle.description; boolps_setgray resourcepsdoc floatgray Sets the gray value for all following drawing operations. &reftitle.parameters; psdoc Resource identifier of the postscript file as returned by ps_new. gray The value must be between 0 (white) and 1 (black). &reftitle.returnvalues; &return.success; &reftitle.seealso; ps_setcolor