Example
Find “colour”, replace with “color”
Before
Our colour guide covers colour theory and colour matching.
After
Our color guide covers color theory and color matching.
Whole words
With “Whole words only” on, searching for “cat” won’t touch “category” or “concatenate”.
Regular expressions
Turn on “Regular expression” to search with patterns. For example, \d{3}-\d{4} matches phone number endings like 555-0199. In the replacement, $1 inserts whatever the first set of parentheses captured.