i) Impose -margin option only seems to ADD space. I wish to subtract space around the page, to make the print come out bigger, but specifying negative numbers in -margin does not work (with or without quotes around the negative margin amount).
java -classpath M:\pkg\multivalent\Multivalent.jar tool.pdf.Impose -paper A4 -dim 1x1 -margin "-2cm" myfile.pdf
ii) I would like to use Impose to automatically crop out whitespace to get a tight box around what is actually printed. I tried -cropbox option but it did not change anything.