In case of hiding KDE taskbar by default, how to show taskbar by keyboard shortcut, not by mouse hovering over the bottom of the screen. I seem can't find the keyboard shortcut to show taskbar in the KDE keyboard settings. Is there a shortcut for this?
I'm not totally sure if that suits your needs, but you can define a shortcut for the Application launcher (the menu which opens if you press on the kmenu button in the taskbar).
The necessary steps are as follows:
(This description is tested on KDE 4.9.2 but should work also for other releases).