Here are the key tools on the Navigation Tool Bar for moving around the design area. The keyboard shortcut is in (parentheses)
Top View (Z T) Navigates to a orthographic plan view
Default 3D View (Z D) Navigates to the default 3D view
Walkthrough (F T) The “Jetpack” mode allows you to walk through the scene using keyboard inputs AWSD, then move up or down with Q and E - and even fly with the space bar
Orbit (O) Click drag the left mouse button to orbit the model view. You can also do this at any time by right click and drag.
Swivel (S V) Use the swivel tool from the navigation toolbar to look around the scene from a stable point.
Pan (P) Click and drag the middle mouse button, or use the pan (hand) tool from navigation toolbar to click drag the left mouse button to pan
Zoom (Z) Scroll the mouse wheel or use the zoom tool from the navigation toolbar to click drag the left mouse button to zoom
Zoom All (Z E) Zoom to fit all of the scene into the current view
Zoom Selection (Z S) Zoom to fit all of the currently selected object(s) into the current view