...

To publish a control into the Custom Palette either drag/drop the control from an existing form onto the Custom tab header or click the publish link in the control's properties. See publishing a control template for complete details.See this Custom Control Video. 

Properties Tab

This is where you define values in a dropdown box, set the max length for an input field, create tooltips, and additional control customization. When you click on a control in your form, the Properties area displays the control’s properties so you can view and edit them. There are also form properties; click the toolbar at the top of the forms work area to access these.

...