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Apologies if the answer to this lurks here somewhere, but a search did not turn it up.

I have a list of numbers like so:



I'd like to insert a leading zero before every single digit number, so that the list appears so:

24 25 23 27
00 04 14 22
24 24 21 21
24 25 20 13
10 12 08 11
12 11 09 11

etc.

I've been banging on this with no luck for a while, so any help is greatly appreciated.

Enable POSIX regular expression syntax in Configure > Preferences > Editor.

Then perform this Replace operation:

Find what: _([0-9])(_|$) [replace the underscores with spaces]
Replace with: 0\1\2
[X] Regular expression
Click Replace All

Or

Find what: _([0-9])\> [Replace the underscore with a space]
Replace with: 0\1

[X] Regular expression

Replace All

Excellent. Thank you very much for the speedy and dead-on help.