Is it possible to open multiple instances of the same .nb (on local disk)?
First, open c:\test1\test1.nb.
After that, can you open another instance(=window) of c:\test1\test1.nb ?
I tried to find related option in global setting of option inspectors, but couldn't.
Note that this question is not about creating a dynamic, where editing one notebook causes the other notebook to be edited in the same way, in real time.
This question has nothing to do with dynamics.