LibreOffice Impress v 7.5 on Windows (Slide pane undocked)

Somehow the Slides pane has come undocked, floating free. I want it back on the left side of the Window, as usual. Did research without success. Neither dragging it there, nor any of the methods described for Impress such as ctrl-shift-F10, work . Any ideas?

Thanks for the suggestion Leroy, but that didn’t work. Still opening up slides pane in a separate window. Anyone else have other ideas or solutions? TIA

ADDENDUM: after the reboot, the ctrl alt doublclick in the area next to the word “slides” seems to have done the trick after all. Before the reboot that wasn’t working. All good now.

Are you sure?