That's because the screen display size is set to maximum. Had the same problem myself
I believe it's the + & - keys (the ones next to backspace) that control it in-game. Hit the minus once and it'll display your HUD.
...for some reason, when I look at the thread list it says 0 replies. Despite this being a reply...
It's no biggie, I'm just thinking of logoth
checking the front page for replies and seeing nowt.