Add Line Number before each line in Notepad++ using Column Editor

If you have a use case wherein you want to add a line number before each line, you can do that using Column Editor in Notepad++ text Editor.

Steps:

1. Open a file or be on the tab where you want to insert line numbers,
2. Be at the start of the line from where you want to prefix line numbers (advance: better to do a Multi-Column Select),
3. Go to Menu: Edit -> Column Editor,
4. Select: Number to Insert
5. Add: Initial number: 1
6. Add: Increase by:
7. Select Leading zeros if you want them.
8. Click OK

Before:

A
B
C
D
E
F
G
H
I
J
K

After:

01 A
02 B
03 C
04 D
05 E
06 F
07 G
08 H
09 I
10 J
11 K

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