Yup, Toms got it......Tilda, The Doc says (alt)-Tilda.

You can also reset the views by pressing Opt/Alt and clicking on the Select Views control.

To switch views using the keyboard, select a preset view shortcut:

• Director's View = ~
• Camera View = 1
• Top View = 2
• Right View = 3
• Front View = 4
• Saved views = 5 through 9

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Ockham's razor- It's that simple