Scale/Move/Rotate messed up

Hello, first post here. I just started useing maya about 1 week ago, so i'm an uber newbie. Anywho, here's my question:

When i click on an object w/ the rotate, the rotate circle no longer shows, i click and drag my mouse and it SLOWLY rotates. Also, when i use the move/Scale tools, the ends of the lines that i use to move/scale are VERY long, they keep going way past the borders of my screen.

How do fix these so they are the defaults?

You can adjust the size of your manipulators in two ways. One is go to the pulldown menu Window>Settings/Preferences>Preferences under the "Manipulators" setting you can adjust their default sizes. Another way is to use the + and - keys on your keyboard when you are using the tools. If your rotate manipulator tool is no longer there but you can still rotate, the icon is probably just smaller than your object. Use the + or - key until you can see it again.