Overview
A full list of all the useful hotkeys in Age of Empires II HD, in a nice image form. Available as a printable page as well.To save the image, click on it and then click on the URL at the top if the display box. You can then right click and save the image to print or use however you want.
Hotkeys
Here is the image depicting all of the useful hotkeys in the game. These are the defaults, though you can change them in the options.
Here is a printable version, if you’re interested in that.