Happy new year!
Here's a gift for all those Paperwhite owners who have been waiting for it: the patch to change the reader margins.
This is a standalone patch again. Simply download the attached file and copy it to the opt/jbpatch directory on the Paperwhite, then restart the Kindle framework - the fastest way is to use the "System" tab of the JBPatch UI.
Note that there are quite a few settings that you can tweak, and it's up to you to find the configuration that you like. Just remember that you have to restart the framework before you see the effect of changed settings, and also remember to read and understand the
documentation before complaining that it doesn't work - it
does work if you do it correctly. Finally, you can use the files from
this post to verify the effect of tweaked settings for PDF documents - you can ignore much of the instructions there (they refer to an outdated version of JBPatch). Simply look at the files with the default settings, and with smaller margins, and you should see a clear difference.
ixtab
EDIT: Attachment removed. This patch is bundled with JBPatch 3.1.0.