Circle Annotations
The Circle tool allows you to draw a circle or ellipse on the document. Hold the Shift key while drawing to create a perfect circle. Once placed shapes can be modified by dragging any of the resize handles on the shape.
Creating a Circle Annotation
- Start the Circle tool by clicking the
in the Comment Tab on the toolbar or using the shortcut key Ctrl + Alt + C (⌘ + Alt + C on Mac) - Click and drag to create your shape (Note: Hold the Shift key while drawing to create a perfect circle.)
- you can also create a simple shape by just clicking on the page
Annotation Properties
To access the Circle properties go to the Properties Tab on the toolbar or right click (Mac: Ctrl + Click) on the annotation and choose Properties in the mouse menu or click on the edit button 
on the Mini Toolbar. The Circle annotation contains the following property settings.
Appearance
Line Width - Sets the width of the border line
Style - Sets the style for the border line (i.e. dotted, dashed, cloud, etc...)
Color - Sets the color of the border
Fill Color - Sets the fill color
Transparency - Sets the transparency of the shape
Note / Comment - A note can be added to shapes that will be displayed when hovered over by the mouse
Save as default - When checked this will make the selected appearance settings the default for any new Circle annotations going forward
Locked - When checked prevents the following on the annotation: being moved or resized, editing appearance properties, & deleting the annotation.
General
Author - Allows you to edit the author
Subject - Allows you to edit the subject
Layer - Only available when the document contains layers. Sets the layer that the annotation belongs to. For more information see Assigning Comments to Layers
Status History
This tab will display and changes to the review status of the annotation including Author, Status, and Timestamp. For more details see Setting Status or Check Marks on Annotations