When you add an offer or broadcast activity to the Interaction Designer workspace, the icon used to represent it will be determined by its channel’s Activity icon style property.
If the offer supports a single delivery method, the icon used is accordant with the selected channel's Activity icon style setting:
•Use default activity icon: the standard offer or broadcast icon is displayed.
•Use delivery method icon: the channel's delivery method's icon is displayed.
•Use channel icon (default icon): the channel's default icon is displayed.
•Use channel icon (custom icon): the selected custom icon is displayed.
If a multi-delivery method offer, the standard offer or broadcast icon is displayed. If a single delivery method offer, with multiple instances of the type of channel, the standard offer or broadcast icon is also displayed.
Note that the customization of icons is also applied at queue listener and subscription group activities.