Add incrementing number part way through file name

Help & Support
1

I would like to be able to add an incrementing number part way through a file name, say starting at character position 15.

I am sure this must be possible but I can't work out, from the help pages, how to do this

2

Here's one way to do that:


The two patterns are:

(.{15})(.*)

\1 [#] \2

3

Thanks.