Click on "Browser Settings" → "Visibility" → "Show Fan Spending" on the sidebar and enable the option.
Click on "Browser Settings" → "Display Settings" → "Fan Spend Color" on the sidebar and see your list of all fan colors.
If you don't have any fan color, just add it by using the "+ Add Fan Color" button.
Configure the highlighting of your fans: choose the minimum fan spending, and select different highlight colors and inbox colors.
You can edit a fan color by clicking on the pencil in the "Action" column. You should click on the trash in the "Action" column to delete a fan’s color.
You will notice that the inbox now shows how much your fans have spent in total.