The input help description should be rewritten to present the same information as the summary in the manual entry. 

The command returns you to the web page you were working on before you worked with the items discussed below.

Pages can include rich content using technologies such as Oracle Java and HTML5, as well as applications and dialogs. Where these are encountered in browse mode, NVDA will report "embedded object", "application" or "dialog", respectively. You can quickly move to them using the o and shift+o embedded object single letter navigation keys. To interact with these objects, you can press enter on them. If it is accessible, you can then tab around it and interact with it like any other application. A key command is provided to return to the original page containing the embedded object:
Name
Key
Description
Move to containing browse mode document
NVDA+control+space
Moves the focus out of the current embedded object and into the document that contains it