If you have occasion to do a live demonstration that’s being projected onto a larger monitor or screen, you can change a setting in the desktop Control Panel to make your touch points show visual feedback. This allows your audience to better follow exactly what you’re doing.
That setting is in Control panel > Hardware and Sound > Pen and Touch > Change touch input settings, then check the “Show visual feedback when touching the screen” box (see below). You might also want to check the “Optimize visual feedback for projection to an external monitor” box as well. Note that this setting appears only on systems that are touch-enabled.