Precisely Placing Markups with Grids
Grid and snap-to-grid functionality is included in Revu to aid in precise placement of markups.
Viewing the Grid
When the Grid is enabled, a dotted grid background appears on the page. This grid is a guide only and will not print. Click 
Show Grid on the Status bar.
Snapping to the Grid
When Snap to Grid is enabled, markups will automatically snap to the nearest grid point. Click 
Snap to Grid on the Status bar.
To override Snap to Grid without turning it off, press and hold