Because the mouse wheel is so versatile, many users use it exclusively for zooming and panning. You can zoom or pan with the mouse wheel without interrupting whatever command you may be using at the time you zoom or pan. If you click and drag with the mouse wheel, you will shift to a 3D orbit view, which is not recommended in 2D drawing. This will zoom out or in to fit all of the objects in your drawing to the edges of the screen so you can see the entire drawing. If you double–click with the mouse wheel, you will activate the Zoom Extents command. As long as the scroll wheel is pressed down, you can drag the mouse to change your view position without zooming or moving any objects. When you press down and click with the mouse wheel, the cursor will turn into a hand icon and the Pan command will temporarily be activated. You can also pan by clicking and dragging with the mouse wheel, using it as you would a mouse button. Point the cursor to where you would like to zoom and turn the mouse wheel to zoom in and out.
Zooming and panning in AutoCAD can be done entirely with the mouse wheel.
Learn the basics of AutoCAD navigation to make your workflow easier.
