I'd like to be able to select multiple consecutive items by SHIFT + CLICK
By design the DropDownList allows only single selection. The MultiSelect widget: https://demos.telerik.com/kendo-ui/multiselect/index
allows multiple items to be selected. For that reason, we are changing the product of this feature request from "DropDownList" to "MultiSelect".
Note that while the MultiSelect allows multiple selection by consecutively clicking items, the requested "Shift + click" functionality is not available out-of-the-box.
We will monitor the interest towards this feature request and consider adding it in the future.