It can trim each line, collapse multiple spaces into one, remove blank lines entirely, or remove all whitespace from the text.
It removes leading and trailing whitespace from every line in your text, without affecting whitespace in the middle of lines.
It reduces any sequence of multiple spaces or tabs within a line down to a single space.
It removes every space, tab, and line break from the text, joining everything with no whitespace remaining.
Yes, "Remove Blank Lines" only removes lines that are empty or contain only whitespace, leaving the content of other lines untouched.