cineSync has four drawing tools - Pencil, Arrow, Circle and Text Box. You can change the current drawing tool by selecting the drop down menu to the right of the transport controls. Also included in the the drop down is an Eraser and if using a Pro account, a Zoom Tool.

 
 

 
The Pencil drawing tool is selected by default. To use it, simply click and drag with your mouse anywhere on the movie frame. As you create drawings they will be visible to all other participants in the review.

Your drawing colour can be chosen using the colour well to the immediate right of the tool selector. Your drawing colour is also displayed in the Buddy List for everyone else to see.

 
Pencil line thickness, Arrow size and Eraser size can be defined using the Line Thickness menu in the Drawings menu, or you can increase the thickness one step at a time by pressing the ']' key or decrease the thickness by pressing the '[' key.

Pencil thicknesses of "16", "32" and "64" are only available with Pro accounts.