What is the shortcut key used for Ctrl + Shift + M?

Review the verified answer and explanation for this GHQ Army Selection & Recruitment Directorate (Civilian Personnel Wing) past-paper question on CampusFin.

What is the shortcut key used for Ctrl + Shift + M? Answer: Removes a paragraph indent

In Microsoft Word, Ctrl + Shift + M removes a left indent from the selected paragraph, opposite to Ctrl + M which adds one.