A C1NavigationListInputItem is a navigation list item that allows users to input text. An input item can either be nested within a C1NavigationListGroupItem, or it can be used as a standalone item.
The following image depicts a C1NavigationListInputItem with text input:
You can add watermark text to the item by setting its WaterMarkText property. The following image depicts a C1NavigationListInputItem with a watermark: