It removes duplicate lines from your text, keeping only the first occurrence of each unique line.
When enabled, it treats lines like "Hello" and "hello" as duplicates of each other, even though their letter casing differs.
Yes, it keeps the first occurrence of each unique line in its original position rather than reordering the text.
No, it is off by default, so "Hello" and "hello" are treated as different lines unless you check the option.
It is useful for cleaning up lists, logs, or any line-based text where duplicate entries need to be removed.