By default, the Show Time As and Label As popup menu items, and label and status editors in the Appointment Edit Form provide only a text description of the corresponding labels and statuses. This example illustrates how to enhance the appearance of the built-in Label and Status editors, and show icons reflecting exact label/status colors in these cases. All required images for the built-in Labels and Statuses are located in the Image folder of the example.
To show icons for the menu items of the Popup Menu, handle the ASPxScheduler.PopupMenuShowing event and assign an image path to the MenuItem.Image.Url property of the required menu items.
To show color icons for the label and status editors in the Appointment Edit Form, create a custom edit form, and assign the Url value to the ListEditItem.ImageUrl property for each item of the label and status ASPxComboBox controls.
Refer to the How to: Customize a Form Using Templates documentation article describing the standard approach of the appointment edit form customization.