update column data for specific rows

[Naveen D]

I want to replace 0 in 3rd column[rows] with 000; should not update 0 rows in other columns

[John Bowman]

perhaps column select (alt+shift+arrowkeys) or multi select (ctrl+shift click, must be enabled in settings) would aide you in a one time job, but if it’s something you do regularly you may need a fancy regex search and replace.

[Matyáš Krupička]

How are those columns delimited?