Sometimes, when you try to navigate in a very tight, inside facing mesh or simply an interior it may get difficult. This is where a wide-angle view would come handy. You can change the Field of view angle in a 3D viewport, by making the view active and depending on your navigation style perform the hotkey combination below.
Default: shift + mouse wheel scroll
Autodesk: shift + right click drag
Leica: shift + right click drag