Using MaxTo is simple enough. Simply install and set up your regions. This page provides a little more detail.
MaxTo splits your screen into rectangular regions. Every time a window is maximized, MaxTo intercepts the event, and instead moves the window to fit inside one of these regions. You set up these regions yourself.
Right click the MaxTo icon in the notification area and select Change regions, then select Main. All of your monitors should be covered with semi-transparent, gray windows. Experiment with the buttons on these windows to split your monitors into regions. Click Done when you are finished.
Now try to maximize any window, and observe that it only maximizes to the region your mouse cursor is in.
You can have two completely different region configuration. The one changed above is the main setup, and is the one that is active all the time. The alternate setup is accessed through the notification icon, by clicking Change regions and selecting Alternate.
You activate the alternate setup by holding Alt when maximizing a window.

MaxTo is delivered with some predefined profiles that you can use, if you wish. They are accessed through the Profile button while you are changing regions.