The Min3ditorHotkeys plugin introduces minimalist editing enhancements to Obsidian by adding hotkeys for quick line management and duplication tasks. It enables users to insert a new line either above or below the current line, regardless of the cursor's position, and provides a shortcut for duplicating the current line or a selected block of text. These features streamline the editing process, reducing the need for repetitive mouse actions and improving efficiency when working with notes.