You cannot it is Dependent on the Printer Driver. Unless you get one created Custom. If it says that it prints as you want for that printer then it's the Printer Properties from Start\Settings\ Printers you need to access to set it up
Yes what it means is that to print edge to edge you have to use the correct size photo for the Photo Paper you print on. Not just say Print a A4 photo but Picture is Square just think what it would look like
Hi, I am not familiar with HP, I have Epson. In my printer preferences I have a box to tick if I want edge-to-edge printing. Of course there will be some paper to trim off if it is a square photo on oblong paper. But I usually use Postcard size paper and e-to-e printing, works great.
If you have the latest drivers for your printer perhaps then you might have a box or similar for e-to-e printing.