Hi @adam_plast,
yes, licensed or not, that is possible by extending the spacedesk display via the Windows display settings
and presenting to this display. Please refer to our user manual Configuration and Settings topic (https://manual.spacedesk.net/DesktopExtensionorDesktopDuplica.html) for further details.
Did you mean the pop-up window “spacedesk Non-Commercial Viewer connected”? This is expected to show for users who use the free version of the spacedesk Viewer app. If you wish to continue to use spacedesk as a free version, then minimizing the window is the only thing to do.
If the presentation needs a keyboard input from the spacedesk Android viewer app and
if it is connected via network/wireless, then it requires commercial license to enable password and security.
An alternative is to connect by USB cable where keyboard input is always allowed.