Category icons can be found under My Calendar > Categories. Category Editor > Category Icon.

Click the Help link (blue circled ?) to show a list of available icons that can be added to a category.

Go through the list and note the name of the icon you would like to use. Close the popup.
In the Category Icon field begin to write the name of the icon. E.g. anchor. Select the icon. We will see the full name anchor.svg show in the Category Icon field.

After having clicked Add Category. If the Category Settings option “Hide Category icons” is not checked then we will see the icons in the Category List. (Note: If “Hide Category icons” is enabled, the interface to select icons is also hidden.)

Icons will be seen on the front end in the calendar and in the list of categories below the calendar.

The icon is also seen in the single event view.

To hide the icon click the checkbox for “Hide Category Icons” in the Category Settings section.