When you open DWG FastView for Windows, you will see as following:
If you are a old hand of CAD software such as Autocad, this part is extrmely easy to master but if you are a newbie of Autocad, it seems a bit difficult to understand. Click the down arrow and you will see:
Zoom in and out is very easy.
Object, you'd better select an object first and try.
Centered, you should specify a point first.
Pan, the easiest command, click on it and click the small hand aside, you can move the drawing view.