Move 7 in detail

Shown below are figures to help you visualize what the steps of Move 7 involve.

 

Move 7: V U2 V-1 U2

Figure 13a  Figure 13b 
V: Rotate the middle vertical slice clockwise
(up and away) one turn
U2: Rotate the top side clockwise twice
Figure 13c  Figure 13d 
V-1: Rotate the vertical slice counterclockwise
(down and toward you) one turn
U2: Rotate the top side clockwise twice
Figure 13e 
The move is complete, and has exchanged 3 of the 4 out of place center-edge pieces. In this example, the pink-yellow center-edge piece is now in the correct position (though still not oriented correctly).

Continue step 6