When exporting graphic slices in PNG format, I would like them to have a white background and be anti-aliased. As I am writing this, the only possible alternatives are either anti-aliased with transparent background (except for rehearsal marks and possibly other objects that I am not yet aware which btw makes no sense) or aliased with white background.
The reason for exporting without transparent background is for sharing the content on forums and such where the background might be some other colour than white making the otherwise black content hard to see. In fact, in Windows 10’s Photos app with dark mode enabled, that’s already the case.
All the best!