The Rulers, Grid, Page Dividers, and Snap tools are found on the Page tab. Read about their functionality here.
To show or hide the rulers around your Work Area, select or deselect Rulers. Similarly, to show or hide the grid in the Work Area, select or deselect Grid.
To see the page breaks in your visual, select Page Dividers.
To quickly turn snaps on or off, select or deselect Snap.