You can use TradeManager 2009 to communicate with your contacts efficiently. Please take the following steps:
1. Right click the contact and select "Invite for Graffiti";

2. Waiting your contact approve your request;
3. Make use of tools to drawing interactively with your contact;

You can import a picture as background and edit it if necessary. When you finish, you can save the graffito.

You can also click "Invite for Graffiti" in the conversation window as showed below:

Please note: only when your contact approved your request, could you start your graffito.