Wanted my 7" Raspberry Pi to stand up in portrait orientation but couldn't do that with luc_e 's case design so I redesigned the back cover of the case to allow for a set of feet to prop it up.
This panel works directly with luc_e's "Raspberry Pi 7 Inch Touchscreen display case" at https://www.thingiverse.com/thing:1585924
Feet slide into the dovetail on the back, leg extenders make it more stable and simply fit into the hole in the bottom of the feet.
If you glue a small electronics push button into the corresponding hole in the panel you can then glue the button top to the push button from the outside of the panel to extend its reach. This can then be wired to your Pi as a wake up/start up button with a couple wires.