This is a regex feature that seems to be unique to TexPad on Windows. From their help files:
\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.
To insert line numbers at the start of each line:
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:
That would be seriously cool. We're looking at migrating from TextPad to Sublime, and would love to retain this feature.
Customer support service by UserEcho