I just discovered the window manager feature in kde that lets you put any window as a tab in another window, how cool and useful is that. So when I am pasting content from the web, I just put terminal as a tab on Chrome browser window and switch back and forth. I also always have a dolphin window as a tab in the konsole app. Plasma is one sweet app, technology thing. I can not believe I tried this 5 years ago and hated it, what was I thinking.
Ok, now that I am back at my main machine I realize this is a KDE 4.10 RC2 feature and is not in 4.9.5. 
Oh well I can wait another month or so and have it with openSUSE 12.3. 
Actually, it’s there since 4.8, possibly earlier IINM. Just right-click the window title bar, choose move window to group, choose a group/window and it will be “tabbed” at the title bar of the other group/window you chose.
Yep, just tried it on 4.8.5 and it’s there. Never tried that solution before, so I just need to work out what problem it will solve here…
Of course thanks to anika200 for the introduction. 
lol!lol! Ya, me too. Really though it does work well on small screens and with slow track pads. I find it saves a little mouse travel and saves on space.
Right, it does help on a notebook, especially with a widescreen @ 1366x768, plenty of width for multiple tabs but short on height. If anything my trackpad is a bit too fast anyway.
Grouping (on 4.8.5) will take in a window from a different desktop/workspace, but doesn’t return it on removal. That’s ok since the return can be done as normal with “Move To Desktop”.
Gnome3 (default setup) also needs this feature to avoid switching to “Activities” screen (selectable mini-window pics) when locating obscured widows.
nice feature ! it can make things simple because it turns window switch into tab switch. thanks for your introduction.lol!
anika,
Thanks for the tip I didn’t know about this 'til now! What a feature!