The Measurements field allows you to accurately define several dimensions of your polygons. You can create a precise polygons by explicitly typing the center point location, radius, and sides in the Measurements field. The Measurements field prompt changes to 'Point' when the Polygon tool is selected.
Defining the center point location
You can set the center point of a polygon, before making the first click with the mouse, using absolute coordinates. For example, to set the center point to location 10",2", type
[10",2"] followed by the Enter key (Microsoft Windows) or Return key (Mac OS X). The Measurements field prompt changes to 'Radius' after a center point has been established.
Absolute coordinates are measured from the upper left-hand corner of the page.
Defining the radius
You can set the radius of a circle by typing in a radius value in dimensions or points. For example, to set the radius to 5", type
5" followed by the Enter key (Microsoft Windows) or Return key (Mac OS X).
Specifying the number of polygon sides
You can set the number of sides for your polygon typing the side value, followed by an
s, in the Measurements field followed by the Enter key (Microsoft Windows) or Return key (Mac OS X). For example, '8s' results in an 8 sided polygon or octagon.