If uneven backlighting makes it harder for you to make out the edge keys at the top and sides, then cranking up the backlighting can help even it out more.
While dim backlighting can make the keyboard harder to read in lit rooms, it can still be uneven when used in darker rooms. Once you've manually adjusted the backlighting once, the backlighting should stay at that level until rebooted or manually adjusted again. You can turn off the backlighting on your keyboard by tapping the shortcut Alt + Brightness down until the backlighting slide drops to 0%.
However, in rooms that are lit naturally or partially, the dim backlight can combine with soft reflections on the keys to make them even harder to read than if they weren't backlit at all. The C434's backlighting comes on automatically and that's useful in truly dark environments.
