To add rich text notes to a particular task, do the following:
Bring up the Task property sheet by double clicking on the relevant task in the task list. Select the Notes page.
Type in notes, using the format toolbar to add colour, fonts and character style to your text. Press OK to save your changes.
If a Task has some notes associated with it then a {bmct help0017.bmp} marker will be displayed against the task in the task list.
For more information see Adding Notes to OfficeTalk Data.