Why does my photo resolution decrease when I save a copy of an edited photo in Windows 10 Photos?

[Windows Central Question]

It seems that any time I edit a photo in Windows 10 Photos (i.e. crop, filters, etc.), then save a copy of the edited photo, Windows 10 automatically reduces the resolution of my photo. This is causing an issue when I then try to print the edited photos or use them in photo books. Is there a way to save the edited images in the same high resolution as the original photo?