Copying from Meik's mail (https://mail.kde.org/pipermail/rkward-devel/2013-October/003670.html). See the link for follow-ups on the list.

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a while ago, we were discussing the possible inclusion of the graphics devices 
somewhere into the main window of RKWard, instead of (or in addition to) 
opening it in a separate window.

i made a first draft of how this could look like:
 http://reaktanz.de/stuff/R/RKWard_graphics_section.png

the most "difficult" decision is where to put the menu entries. in the draft 
the graphics device has focus and its menu entries completely replaced the 
usually available menu. but maybe the normal menu should simply be added to, 
and not being replaced?

also, if there were more graphics devices active, you'd probably need tabs in 
that section, too. alternatively, the "graphics devices" button could work as 
a tab (i.e., be called "graphics device #1" instead and be added more bottons 
for additional devices).