Column Editor plugin

Insert the same text — or an auto-incrementing number sequence — down a vertical (column) selection, one value per row. Ideal for numbering lines or filling a fixed column the same way on every row.

Where to find it

Edit ▸ Column Editor… — shortcut Alt+C.

Using it

1. Make a column (rectangular) selection spanning several rows — hold Alt and drag, or use the column-select keys. (An empty rectangular selection at a fixed column works too: the value is inserted at that column on each row.)
2. Open the Column Editor and pick a mode.

Insert Text

Type a string; it is inserted at the selection's column on every row.

Insert Number

Generates a numeric sequence, one value per row, from these options:

Option	Meaning
Initial number	The value on the first row.
Increase by	Added to the value for each new row (may be negative).
Repeat	How many consecutive rows share the same value before the increment is applied (≥ 1).
Leading	Padding to a minimum width: None, Zeros (007) or Spaces (7).
Format	Number base: Dec, Hex, Oct or Bin.

For example, initial 1, increase by 1, repeat 2, leading Zeros, width 3 over six rows produces 001, 001, 002, 002, 003, 003.

Numbering a list

Select the column where the numbers should go (even a zero-width column at the left margin), then Insert Number with initial 1, increase by 1 to number the rows 1, 2, 3, ….