Closing an application in Kubuntu is usually a straight-forward matter, however,
it may be accomplished in several different ways depending on the situation and
personal choice.
For most applications, clicking on File->Quit in the application's Menu Bar (upper-left corner of the
application window) will close the application.
Clicking on the X
button in the upper-right corner, on the window's titlebar, will close the
application.
Right-clicking on the window's titlebar and
choosing Close will quit the application.
Right-clicking on the application in your
Toolbar's window list and choosing Close will
quit the application.
If you prefer keyboard shortcuts, you may close an application by pressing Alt-F4 on your keyboard.
Be sure to save your work in an application, if necessary, before you close
it!
Published under the terms of the GNU General Public License