I have a pdf file shown upside down. So I use Okular to rotate it and it looks good. The problem is, The next time I open it with other software, it's still upside down. If I open it with Okular, it is not.
I am wondering what's happening underhood.
- I do have write permission on that file.
- I tried "save a copy to", but no effect. Actually, there is no save operation needed to be done. The file seems not even been modified after I rotate in Okular.