Click on the item (in this case, an email message). Locate the Tags group, then click to open the Categorize menu.
Select a category to assign to the email message by clicking on thetick box to the left of the category name you have chosen, asillustrated in the following screenshot:
Click on OK to return to themailbox. Note that the email message now has a category color assignedin the Message pane. The size of the Message pane depends on what youwill see when you add a category (either the color block plus thecategory name will display or just the color block). If you open theemail by double-clicking on it, you will also see that the messageheader section contains the category you have assigned, as well as thecolor.
You can assign more than one category to one email message. Rememberto click on a category to remove it from the email message if you decideto change to a different category color.
Color categories can also be applied to calendar events. Right-clickon a calendar entry to access the Categorize option, then select a colorcategory to assign to the item, as illustrated in the followingscreenshot:
By adding calendar category colors this way, we canfocus on important, or urgent, must-attend events in ourcalendar.