I just started using KDE plasma (on Debian Stretch). Now, I'm a simple, old-fashioned guy... ok, that's not true, but when it comes to Alt-Tab I am. I just want the plain old Alt-Tab behavior - like in KDE of old, like in LXDE, like in Windows - you know what I'm talking about. Nice row of icons in the middle of the screen.
so, I go to K > System Settings > Window Management > Task Switcher , and examine the 'Visualization' option. I see: Breeze, Flip Switch and Cover Switch. But none of them are what I'm looking for. I remember seeing other options on some other machine with Plasma - how do I get them to show up?