Thank you very much for your reply!

We came across these solutions before posting our question on the forum, but since the Viewer was being launched within an event system as one of the items that could be clicked by anyone passing by, those were no options.

We were hoping there was some general 'Hide taskbar' setting that could be checked within the Viewer before launching the event screen.

In an attempt to reduce the 'damage' to a minimum we just used the pc's 'Auto-hide the taskbar' :-)