How do I search for a word at the beginning of lines or a word at the end of lines?

Using regular expression

In regular expression, the metacharacter ^ represents the beginning of a line and $ represents the end of a line. In the Find dialog, use the Regular Expressions option. If you enter ^Search String, it will find an instance of of “Search String” at the beginning of a line and Search String$ will find an instance of “Search String” at the end of a line.

Using escape sequence

If you change the find type to Escape Sequence, a new line is represented as \n. Enter \nSearch String in the Find field if you want to find “Search String” at the beginning of a line, or Search String\n if you want to find “Search String” at the end of a line.