If the Date Edit component has the Nullable DateTime type, users can delete the editor value (set it to null).
You can also set the ClearButtonDisplayMode property to Auto to show the Clear button when the editor has a non-null value. Use the NullText property to display the prompt text in the editor when its value is null.
<DxDateEdit> adapts a datapicker to the device type.
Mobile and tablet devices display a datapicker as a scroll picker.
Mobile devices show a datepicker in a modal window.
Other device types display a datepicker as a calendar.
Set the PickerDisplayMode property to Calendar or ScrollPicker to show the same datepicker type on all devices. For the scroll picker, you can also use the ScrollPickerFormat propety to define the date format for each part (a day, month, and year).