Full screen mode under kde with any window
I found my new favorite shortcut (under kubuntu 14.04) Ctrl
+Shift
+f
which brings applications like okular or kate to full screen. Unfortunately it does not work with konsole, chrome, etc. which brings me to the question: Why, and how to do it anyway?
KWIN Global Keyboard Shortcut
KDE System Settings > Shortcuts and Gestures > Global Keyboard Shortcuts
Add a 'Make Window Fullscreen' shortcut to the KWIN