[EnergyLens]

Here is a little script that can be called from the OpenWith plugin in Calibre to automate the use of Briss <http://sourceforge.net/projects/briss/> to Crop PDFs for easier reading on your eReader.

You need to make the file executable and edit this line in the file:

# Must specify the location of briss-0.9.jar on your system
path_to_briss = '/Applications/ebook tools/briss-0.9/briss-0.9.jar'

For those on Mac: I just updated to Yosemite and had to re-install Java to keep Briss working: <http://support.apple.com/kb/DL1572>

The program will make a copy of your original PDF and add an ORIGINAL_PDF filetype into the Calibre database (similar to ORIGINAL_EPUB). You can then try to teach your OS to open the ORIGINAL_PDF filetype with the PDF Reader of your choice (though Preview refuses... so I had to use Adobe on Mac).