is a variable defined in `
Its value is
Specify column number to start prettifying.
See also `delimit-columns-end' for documentation.
The following relation must hold:
0 <= delimit-columns-start <= delimit-columns-end
The column number start from 0 and it's relative to the beginning of selected
region. So if you selected a text region, the first column (column 0) is
located at beginning of line. If you selected a text rectangle, the first
column (column 0) is located at left corner.
You can customize this variable.