linking pdf file in beamer latex without switch off first document slide [duplicate]

I use \href to link my pdf file in my presentation. The problem is, it change my first document slide to the linked pdf. So, i have to reopen my slide again to continue my presentation. How can I make the linked pdf document open in new pdf document? (like open a new tab/window?). So, i don't have to reopen my slide presentation. Here my commands:

\begin{proof}
\href{run:./proof 3.1.4.pdf}{proof 3.1.4.pdf}
\end{proof}


marked as duplicate by AlexG, Stefan Pinnow, Bobyandbob, Sebastiano, TiuriMay 23 '18 at 8:46

The hyperref manual says:

\href[options]{URL}{text}

The optional argument options recognizes the hyperref options pdfremotestartview, pdfnewwindow and ...
Thus, pdfnewwindow is what you need. This option can also be given as a package option, acc. to section 3.9, in order to have a global effect.