It is still a draft, with sections labelled "Content to come".  I think the online Nexus7 Help is more up-to-date.

Oh, I didn't realize that after you install a widget, it does nothing.  The N7 guide doesn't say what a widget is -- it is a word with no meaning to me.  The guide says how to put a widget on your home page, but after installation I thought that the battery widget *was* on my home page.  Sigh, ir did nothing.  Now I got it working -- only took three days.

  With my phone, when it is turned off and is charging, I can touch the screen and see if it is finished charging, so I thought the N7 might have something similar.  But I guess it doesn't

I did what you suggested, but I guess it is impossible to do what I wanted -- with the N7 turned off and attached to the charging cable, I assumed there must be some way to see whether it was finished charging.

Help!  My family is going to make me return the Nexus 7 if I can't figure out how to turn off the click sound when each key is pressed on the on-screen keyboard.