Adding items to automatic formatting

[RDS]

I want to add an item to automatic formatting. The help file gives the
following:

Color appointments and meetings automatically

In Calendar, right-click the calendar grid, and then click Automatic
Formatting on the shortcut menu.
Click Add, and then type a name for the rule.
In the Label list, click a color.
Click Condition to specify the conditions under which the color will be
applied.
Note If you manually assign a color to an item, automatic coloring cannot
be used on that item.