I can't offer any help with margins, but with launchpad there's a way to much more quickly rotate the screen--if you're having to do it a lot, you might as well have a shortcut for it like
Shift R. If you've got launchpad installed and set up, just add this to one of your ini files:
Code:
R = !if [ "$(cat /sys/module/eink_fb_hal_broads/parameters/bs_orientation)" == "1" ]; then lipc-send-event -r 3 com.lab126.hal orientationUp & else lipc-send-event -r 3 com.lab126.hal orientationLeft & fi
PS: That is from dsmid in the launchpad thread.
Here's his original post.