Here's a video (in French; I've no idea what he's saying!). At the 1:10 mark he holds the Oasis a bit too far tipped backward, and it flips the text on him. So there's a sample of how far you can move it while laying down in bed. I'm not sure the direction is the one you would be moving it, but it might be a helpful thing to see.
(I'm trying to see the port on the cover, but nobody seems to care much about the cover on these videos. However, I *am* getting less in love with
some of the red versions, which depends on the dye lot, and more fond of the brown!)