Bogger Help

So I have another blog- I'm not on it as often, as this one, and I've tried to get out of my funk on it by updating my layout... I went to try to add a gadget, and the tab isnt there...

What the hell is blogger doing? I don't have a 'design' tab, only a template tab.... but that only lets me pick a dumb template, so now I'm stuck with dumb minima... anyone else having this problem?!? Help! My blood pressure is rising... I can feel it!