Show a Progress bar is an option available exclusively for Desktop projects because the touchscreen devices can't visually show on screen user's moves previews to the interaction, such as hover, for example. Therefore, the present article explains how to set up the option Show only for desktop's projects since the option Show is not available for multidevice and mobile projects.
If you set the drop-down parameter Show on the General submenu of the Properties panel with the option Always, progress bar will be displayed all the time –within the time you had previously set–, if the mouse pointer is in movement as well as if it is not.
Show only on mousemove
If you choose the option On mousemove on the drop-down menu itself, progress bar will only be displayed if and when the mouse pointer is moving. As soon as the cursor stops, it will disappear and will appear again when it detects movement again.