Reset To Start View
Reset To Start View.
Contents
Reset to Start View
Choosing this menu item will return you to the original camera position for plan3D when it opens a new document.
Undo View Change
This backs up to the previous camera position - undoing your last movement. You may do this several times to "back up" as many views as you want.
More about Edit> Undo View Change
Favorite Views
You can also jump to a saved Favorite View if you get lost with View> Favorite Views