If you hold down the Alt key and press the four digit code on the number pad, the diagram will appear on your page at the cursor position.

As for the second part of your question, I tried A7 and didn't find it. Gave up with that.

Just a query: how do you get the symbols to print at the bottom of your NWC printout? I haven't found any way to change the page layout to any great extent and the only things NWC prints at the bottom of the page seem to be the copyright notice/all rights reserved.