Versal uses gadgets to build lessons. Gadgets are located in the gadget tray at the bottom of the browser. Clicking the arrows in the gadget tray will scroll through the gadgets in the tray. Clicking the buttons below the tray takes you to a new gadget category.
Drag and drop a gadget onto the empty canvas to begin adding content to your course. What happens next will depend on the type of gadget you are using. Explanations of each gadget are found here.