Briss has been a wonderful tool for Windows and open-source OS systems to trim off excess white spaces surrounding some published PDF documents. Is there any way to do global trimming? Or is there a convoluted method involving defining new Master page resizing, etc. ?
On the Briss tool (last version 0.9) one could drag corners to desired proportions for Left and Right pages and it is done on requesting a crop. It automatically appends a suffix "_crop" to output filename if required.