I changed Simulator resolution to iPad Landscape (Configuration > Surface) but half top of the window is off the screen. Restarting configuration solve the problem but after changing resolution to iPad Landscape, I face this problem again.
Another problem: Quality of graphics displayed in simulator is lower than my original graphic. I don't have any device to test the quality on real tablet.
(See here: http://postimage.org/image/kr9g6tn29/) Any thought why this happen?