What is the navigation wheal function in Autocad?

zoom, pan,center ,look ,walk ,orbit and rewind. in3D model. You can show/hide the steering wheel by pressing [shift]+W. 

Steering wheel is the navigation tool that stick to your mouse. You can find the navigation tools here, like: zoom, pan, and rewind. If you want to try the navigation tools other than those three, try in3D model. You can show/hide the steering wheel by pressing [shift]+W. Or click the steering wheel button on the try, right side of your status bar.