TextPad wrote:You can update or insert sequence numbers, using replacement format strings on the Replace dialog box, with the Regular expression option checked.

The syntax of the \i replacement format is: \i{start,increment,width,fillchar}

where start and increment are signed integers, width is an unsigned integer, and fillchar is any character, but normally space or '0'.

Without any qualifiers, \i is equivalent to \i{1,1,0, }.

Expression: Effect:
\i Replace with numbers starting from 1, incrementing by 1.
\i{10} Replace with numbers starting from 10, incrementing by 1.
\i{0,10} Replace with numbers starting from 0, incrementing by 10.
\i{100,-10} Replace with numbers starting from 100, decrementing by -10.
\i{1,1,3,0} Replace with numbers starting from 1, incrementing by 1. The numbers will be right justified in a width of 3 characters, zero filled.

Note that if more than one \i expression is used in a replacement format, they increment independently of each other.

Examples:

1. To insert line numbers at the start of each line:
   Search for: ^
   Replace with: \i
2. To update sequence numbers of the form Axxx, Bxxx, ..., Zxxx where "xxx" is any number >= 100, independent of the letters, which are to be preserved:
   Search for: (\u)[1-9]\d{2,}
   Replace with: $1\i{100}