How can I create the "Run all code" button (at the top right corner) in Mathematica notebook?
The current method I have is to save the .nb file into .wls (i.e. Wolfram Language Script), and then open the .wls file (which have a "Run all code" button at the top right corner) and save it back to .nb file. But this method seems silly and clumsy and I wonder if there's a better method to do it.
