Middle Mouse Button drag: orbit the view
Shift + Middle Mouse Button drag: pan the view
Mouse Wheel scroll: zoom in and out
Ctrl + Middle Mouse Button drag: zoom the view
Numpad 1: front view
Numpad 3: right view
Numpad 7: top view
Ctrl + Numpad 1: back view
Ctrl + Numpad 3: left view
Ctrl + Numpad 7: bottom view
Numpad 5: toggle perspective and orthographic view
Numpad 0: camera view
Numpad .: frame selected
Home: frame all
Shift + C: center view and reset 3D cursor
Alt + Middle Mouse Button drag: rotate around the 3D cursor
Use the navigation gizmo in the top-right of the viewport
Use the view menu for orbit, pan, zoom, and framing options