Regex supports capture groups, in other editors like notepad++, and vscode they support referencing those groups when running find and replace.
This article explains how it works in other editors
A re
It's useful for renaming a lot of signals at once. Or when changing a signal type and needing to change the conversion in a lot of places.
Example
"
Abcde
Afgge
"
Find "A.(..)e"
Replace "Ad\1e"
Becomes
"
Adcde
Afgge
"