OneNote 2013: Keyboard shortcut for exiting a text box

In OneNote 2013, let's say you're currently editing some text in a regular text box/field:

Now I want to exit this text box and move the cursor somewhere else on the page. Pressing Escape doesn't work, neither do the usual suspects (Ctrl+Enter, Alt+Enter, etc.). Can I exit the box with a keyboard shortcut of some kind?

I have looked at the official page for OneNote 2013 keyboard shortcuts to no avail.

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