It's my understanding that pics taken on regular cameras will display in the orientation that they are saved in from the editor on the home computer.
But pics taken on phones have some kind of built-in data in the file stating which way up it is to be displayed (?? not sure I really believe that) and that these are the ones that people may have trouble with here. In any event they should be taken into an editing program and oriented correctly before uploading.
Certainly, all my uploaded pics have been camera pics and have displayed as expected.
Someone else might want to comment on this explanation.
Edited By Bandersnatch on 24/09/2019 18:42:56