Center Snap tool

Use the Center Snap tool to snap to the center point of another entity. You can snap to the center of an arc, circle, polygon, ellipse, or elliptical arc. To snap to the center, you must select a visible portion of the entity.    

To set the Center Snap

Do one of the following to choose Center Snap ():    

    On the ribbon, choose Draw > Center Snap (in Entity Snaps).

    On the menu, choose Tools > Entity Snap > Center Snap.

    On the Entity Snaps toolbar, click the Set Center Snap tool.

    Type center and then press Enter.