In earlier versions of Microsoft Outlook, the Organize feature enabled you to create conditional text formatting rules for email messages. In Microsoft Outlook 2010, conditional text formatting is now accessed in the Advanced View Settings dialog box.
Conditional formatting is a way to make messages that meet defined conditions stand out in the message list by using color, fonts, and styles. You specify conditions that an incoming message should meet, such as a sender’s name or email address, and then conditional formatting is applied only to those messages.
For example, a conditional rule can specify that all messages sent from your manager appear in red text in the message list.
A set of default rules appears. This includes the Unread messages rule. This rule makes unread messages appear bold in the message list. In addition, any conditional formatting rules that you created in the Organize pane with an earlier version of Outlook appear.
These are some examples of conditional formatting rules that you can create in Outlook 2010.
Follow steps 1 and 2 in the previous section, and then do the following:
Note The name must exactly match the full name that appears on messages that you receive.
Information Source Microsoft Office Site
In the old system I could colour code my messages and they stayed 'colour coded' - brilliant ! I have been able to colour code messages as they come in but as soon you click on them they return to black. Before you could apply the rule to existing e-mails. So - how do I colour code all existing messages that remain in my 'in' or 'out' box. Many thanks.