SUMMARY This is not a bug, but a request of a new (awesome) feature (at least to me). I think it would be great if there was an option "Open with Okular (new tab)" when I right click a PDF document in Dolphin.
This would require changes in Okular which would be super technically messy and result in two items appearing in the context menu (one for opening in a new tab, one for opening in a new window), which people would certainly complain about. :) Okular itself has an option to always open new documents in new tabs, which I personally make use of, and plan to make the default at some point in the near future. I recommend you do that, and instead open a new instance of Okular manually when you actually do want a new window instead of a new tab.
Hello, Thanks for the response! I already use Okular with tabs (it is just great!). But frequently I am using two or more screens, and sometimes I require to open multiple PDFs (with multiple Okular instances, one in each screen). It there any way to do this?
Manually open as many Okular instances as you want, and in each instance, open the documents that you want to be open there. There isn't a generic way to target a particular instance when you ask Dolphin to open a file in an app, nor is there a great way to add one. Sorry.
I realized that if I open an empty Okular instance, I can drag the PDF file in Okular and it will open that file. I am really happy with this. Your reply gave me that idea. Thanks!
You're welcome!