Use this toDelete from the current position to the start of the line or the first non-whitespace character
Before invokingA document must be open to use this option.
Menu pathEdit > Delete > Delete to Beginning or First Non-Whitespace of Line
Command nameMDeleteLineLeftToggle
Options on parent menu (Delete+)Delete Selection, Delete All, Delete to End of Document, Delete to Beginning of Document, Delete to Next Page, Delete to Previous Page, Delete to the Next Text Paragraph, Delete to the Previous Text Paragraph, Delete Line, Delete to End of Line, Delete to Beginning of Line, Delete to End or Last Non-Whitespace of Line, Delete to Beginning or First Non-Whitespace of Line, Delete Word, Delete to the Right of Word, Delete to the Left of Word, Delete to the Next Word Caps, Delete to the Previous Word Caps, Delete Character, Delete to the Next Character, Delete to the Previous Character