All Tablet PCs have extra buttons next to the screen, to give the user non-pen-based input options when in tablet mode. And of course these buttons can be remapped by the user - the question is what to map the buttons to, and why?
Here's my current setup and the reasoning behind it:
Now, roundabout here I was going to say how I really wished that I could set up the buttons differently for different screen orientations - but I just noticed that option is already available in the screenshot :-) So, I'm thinking that I should set up a dedicated set of "reading" buttons for portrait mode, freeing up the middle button to use for something else in landscape mode. Any suggestions? What do you map your buttons to?