A couple other features are available with these commands and the mouse, but I advise experimenting with these because their behavior can be somewhat flaky.
1. Panning a window around, like in Photoshop. Control/Shift Right click or Control/Shift/3rd mouse button (downclick the mouse scrollwheel), while clicking on the background of the arrange window for example. Click and move in any direction, up, down, left, right, diagonal, or move in circles and the arrange window will follow. The 2nd option there "inverts" the movement. In other words, when you go left, it goes right. In the Matrix Editor, the 2nd option is the only one that works. Also in the Mixer, but in the mixer, don't click on a mixer strip, you have to be clicking on a piece of background.
2. Zooming. You can use this key combination to zoom in any direction, or zoom X and Y at the same time. Option/3rd mouse button (downclick on the mouse scrollwheel), then make a very small move in any direction. This one tends to zoom 2 miles for every half inch you move. It will be zoomed to mars before you can take you finger off the thing. Also, it's good to have something selected when you zoom because it will zoom in on the selection and help you keep your place.
And thanks for the tip about the extra tools with the mouse. I didn't know about that. The software for my mouse is installed, but it still works. I just right clicked on a tool and that assigned the tool to the right mouse button. Command/clicked with the left mouse button and that worked too.