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Each ToolbarDropDownList (such as InsertHtmlMenu) has two associated array properties, a List property and a Names' Property. For InsertHtmlMenu, the two properties are InsertHtmlMenuList and InsertHtmlMenuNames. If set, these properties will fill the InsertHtmlMenu dropdownlist. InsertHtmlMenuList is an array of HTML blocks and InsertHtmlMenuNames is a list of the display names for those values. The length of both arrays must match.
Below are all the possible values