I sometimes move a window on my KDE desktop (Fedora 30) so that the title bar is obscured making it nrealy impossible to do any productive work
- Open the KDE System Settings app.
- Click on "Shorcuts" line under the topic of Worskpace
- On the Shortcuts pane, click on KWin in the Component pane.
- In the search bar enter the word move followed by enter key.
- The "Move Window" action should appear. Click on it.
- Enable the Custom radio button.
- Click on the pop-up button
- Select key-combo.