Thanks, fakebannana; I modified some of the code you sent me and added it to the latest version.

Laughing Man: You can press "menu" (hardkey or on the top") then go to "Transform" and select a rotation. Selecting "Keep Rotation" will make it preserve that rotation when you change pages, and "Automatic Rotate" will rotate the image automatically if it is taller than it is wide (like the default image viewer does.) To make it do this automatically every time, go to Edit>Preferences, then Behaviour, then check "Automatically rotate pages as default".