This guide provides step-by-step instructions on how to restore missing sliders in the Full Note Composer. It explains how to open and lock sliders, and warns against using the X button to close sliders permanently. It then instructs users to go to the "View" menu, select "SlidersDropDown," and choose the missing slider to add it back. The guide emphasizes the importance of using the pushpin icon to close the slider and restore visibility to the side of the note.