The beginning of a line can be represented as "^" and the end of lines can be represented as "$" if you check Use Regular Expression in the Find dialog box. Enter "^Search String" in Find field if you want to find "Search String" at the beginning of lines, or "Search String$" if you want to find "Search String" at the end of lines.
A new line can be also represented as "\n" if you check Use Escape Sequence. Enter "\nSearch String" in Find field if you want to find "Search String" at the beginning of lines, or "Search String\n" if you want to find "Search String" at the end of lines.
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