I use Mathematica for daliy small program and visualization, so I have many samll notebook files. I use long file name to tag and distinguish these files, but sometimes I use short file name (maybe without any meaning) for convenient. Then I will forget what are stored inside.
Is there any method to preview notebook file without opening it. If I set a txt reader as default reader for the notebook file, the preview wil show all things in the format of strings, but not in the cell style shown by Mathematica.