You can use parentheses to enclose tagged expressions to indicate a capturing group. Then, you can use

\0

,

\1

,

\2

, and

\3

to reference tagged expressions. The expression \0 indicates a tagged expression that represents the entire substring that was matched. The expression

\1

denotes the first tagged expression,

\2

is the second expression, and

\3

is the third expression.

The following table describes how you can use capturing groups and line terminators to rewrite or search and replace text: