The Snaps tool is found on the Page tab. Snaps allows lines and shapes to be snapped to the nearest grid point as you draw.
You can turn Snaps on and off by checking or unchecking the selection in the Page tab.
The Snaps are a grid of imaginary lines that extend from the minor ticks on the rulers. When snaps are turned on, the centers (or sometimes the edges) of shapes and lines automatically align themselves with the tick marks on the rulers as they are created, moved, or resized with the mouse. This makes aligning the centers of very easy: You simply drag them with the mouse.
The grid used by the snaps is the same one that is displayed by the Grid command under the Page tab.
Choose how you would like objects in your visual to snap to the grid by selecting from the Snaps drop-down menu.
You can choose whether you snap the top left or center of the shape by choosing either Snap Top Left Edge of Shape or Snap Center of Shape. You set this property for the entire drawing.
The default setting of Center is best when lines are used to link shapes together, for example when creating flowcharts. The Top Left setting is best when the edges of shapes must line up, when drawing floor plans.
When you move or resize objects using other methods, such as with the arrow keys, they do not align with the snaps. This makes it easy to make fine adjustments in position without turning the snaps off.
To turn off snaps, select Do Not Snap to Grid or uncheck the Snaps selection box.