OK...
1. To show UNDEFORMED MODEL in same view together with deformation/stress or any result go to RESULT tab, click on EDIT POST VIEW icon (yellow wrench icon) and in DISPLAY tab check on SHOW UNDEFORMED MODEL.
2. To see inside model, go to RESULT tab, click on EDIT POST VIEW icon (yellow wrench icon) and in DISPLAY tab change last option DISPLAY ON to CUTTING PLANE. Then click on OPTIONS button next to it (it become selectable when you set display to cutting plane).
In option click on counterclockwise icon to see update in real time.
set cut plane as you like in top section options CUT PLANE. Then when you move slider you will be able to see colors inside model. If leave options window by clicking OK, section will stay in main graphic window and you can then change solution results to see how it look in that section of model.
Show feature edges and Show clipped ghost are interesting functions too when combined with possibility to change solutions in main window.
Cowski, jagged looking section is from ANSIS.
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Enjoy your work and have fun!