Can't find docstring display in QT cmake-gui

In curses ccmake it’s there in a kind of status bar at the bottom, but in the QT GUI I don’t see it. I also did not find a configuration option to enable it.
Is it really missing, or didn’t I look at the right place?
Version: 3.18.4

Hover your mouse over the name or value of a cache variable and the doc string should appear as a tooltip after a short delay.

Thanks, this works!