Using the Progur jsWritingTool Designer Interface is extremely easy. Just add the graphic or text elements you want, and press the play button. To modify an element, you can double click on it. You can also have multiple pages of elements. One thing to keep in mind is that your elements will always be drawn in the order that you add them.
After you press the Play button, you must hit the Enter key to draw each element. If you want to clear the page at any point, you can press C. Finally, to exit the presentation mode and return to the designer interface, you can press the Esc key.
Also note that the resolution of the presentation is 1280x720. That means, you can switch to full-screen by pressing F11 and use any screen recording software to record your presentation. Have fun!