#233 Automatically switch the viewer to current document

[adin]

I work with parallel documents most of the time. However, when I switch between them, I need to hit F7 to bring up the associated PDF to the viewer.
Is it possible to add a setting in which you can automatically change the view to the current document (.tex) when it changes in the editor?

A good option could be to set a button to quickly turn it on and off, so if you want to keep seeing the same PDF through all your work you can do it too.

Thanks, and keep with the excellent work.