Suddenly not seeing cell output

Notebook
1

Hi folks,
I’ve been happily using Jupyter in MS VisualCode, but today I seem to have accidentally pressed something that has resulted in:

  • cell output not being displayed
  • all cells except the currently active one having a wide grey border
  • Find function not finding matches (even when there are many matches)
    Any idea what I’ve done and, more importantly, how to fix it?

Thank-you.

2

I’m still somewhat bemused, but found that when I Saved As-ed my ipynb to another filename, the wierd mode disappeared on both the original and the copy. Further wierdly, though, the original and copy were then from different point in time in terms of my editing. So, I seem to have somehow accidentally invoked some sort of function for hang-onto-the-current-version-while-I-do-an-experiment?

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