So you won't be able to mark a news as unread ever again once you open a news if you set quiterss as follows
- Select "Options > Feeds > Reading > Mark news as read > After switching to another news"
The only way to trick quiterss into marking back a news as read is to select said news then select one more news (that is marked as read already), right click and mark read/unread, that way after switching to a different news only the last news will be marked again as read and the first one will stay unread
Another way to trick quiterss is to set it as follows
- Select "Options > General > Reopen last opened feeds on startup"
- Check "Options > Feeds > General > Open the news"
Once you set quiterss, select the news, mark the news as unread, close quiterss and open it again. that way when you switch to a different news it won't change to unread.
So as you see the "Mark news as read > after switching to another news" option is unusable. I think an exception should be added to the source code so news are marked as read when switching news EXCEPT if the user strictly mark the news as unread. and optionally the dialog could be modified to "after switching to another news (except if marked as unread)"