always on top

Have just updated to version 6.3.1.2 and now Calc hides all other screens on desktop. Have searched options, settings etc expecting to find a tick “always on top” so far no success. Anyone have an idea? Many thanks in advance.

Maybe it is in full screen mode [Ctrl+Shift+J] but looks like some setting in the Operating System.

Thank you very much for response. O/s is Windows 10 home. Windows had just upgraded as well. However, since re-booting it seems to work perfectly now, as originally expected. Thank you

There a apps on windows for do it,