Graphics no longer adjustable?

So here's the deal: The lag on my computer was so bad, that i kept unchecking one of the graphics options whenever I logged on. I forgot what the bar on the drop-down menu was, but I think it was between "Tools" and "Help"...
Anyway, it doesn't seem to be there anymore, which is annoying because I can barely play with this lag! I want to turn off some of these graphics!
Anyone know if I did something wrong?

Client menu? Ctrl+Alt+D?

Thank you, I must have pressed a bunch of random buttons when trying to remember a shortcut. Thanks for your help!