The Toolbox panel contains the MockupUI's designing tools, grouped into two tabs: Widgets and Templates.
This tab displays the list of the available UI and graphic widgets that you can use to create designs. To insert a widget into a design, drag it from the toolbox and drop it onto the design area where you can change its position and size. You can add content or customize a widget from the parameters panel.
The templates tab shows the designs that you have saved as templates. You can use a template to create a new design by dragging and dropping it into the design area. Learn more about templates.