OS : window 10
Mathematica : v12.2
By my mistake, I opened another mathematica kernel, not knowing a kernel was already running.
I created a lot of .nb files and worked on them in another kernel, while one kernel was already running with many working .nb.
All .nb are still open.
In this state, how can I know which kernel is handling which .nb file?
I guess that there exist ID(a serial?) concept for both kernel and working .nb file.
And I guess that by executing some command on a working .nb, it is possible to figure out the ID of .nb file and the ID of kernel which handles the working .nb.