lol...no...the OP was looking for a keyboard shortcut to "Add Copy of HTML" page but couldn't find it. I mentioned that it wasn't in any menu but he could use a couple of other options.
Then meme said it couldn't be added as a keyboard shortcut because it wasn't a menu command...but being the Sigil god that he is, he could fix that
I think the OP is just trying to find a faster/more comfortable way for adding the page than right clicking on the html file and selecting "Add copy".