I am a new Mac user but my major inconvenience is to switch between windows in the same application. For instance I work with two or three excel files, and I want to quickly switch between the two files without using the mouse. In windows I have that option by pressing alt+tab, however in mac this combination would only work for switching between the applications. It really takes a lot of time to use a mouse when you constantly work with more then one file in the same application. I know I can also use the F9 key and then move right or left, but its still not as fast as a key combination. Would appreciate if you suggest a solution.