If you have ever tried to model something in Blender, but didn’t have a keyboard with a Numpad, or a mouse with a scroll wheel, you may have given up. Well, there’s no need for that! There are a few quick settings in Blender’s options that will help you. 🙂 Before you start anything, open the Blender preferences by clicking “Ctrl+Alt+U” or by going to File>User Preferences.
Emulate 3 Button Mouse
In the User Preferences, under the Input tab, you will see on the left a little check box that says “Emulate 3 Button Mouse”. Check the box! Now, instead of using the Scroll Wheel on a mouse to move the viewport, you hold Alt+Left Mouse Click. If you want to pan, hold Shift+Alt+Left Mouse Click.
Note: The 3 Button Mouse Emulation will NOT work if you have left-click selection turned on (see picture).
If you are lacking the friendly Numpad on your keyboard, you do not have to worry, because Blender can also Emulate the Numpad. In the User Preferences, under the Input tab, on the left, you will see a little check box that says “Emulate Numpad”. If you click it, it will simply use the normal 1,2,3,4,5,6,7,8,9,0 buttons at the top of your keyboard to change camera views instead of the Numpad.
If you like to switch between layers with the top numbers, you don’t have to enable this option. You can change views by simple going to the View menu in the 3D view, and selecting what view you want from there.
For reference, here’s an overview of what you just did: