Move 1 in detail
Shown below are figures to help you visualize what the steps of Move 1 involve.
Move 1: U-1 F U L-1 U L U-1 F2
|U-1: Rotate the top counterclockwise||F: Rotate the front clockwise|
|U: Rotate the top clockwise||L-1: Rotate the left side counterclockwise|
|U: Rotate the top clockwise||L: Rotate the left side clockwise|
|U-1: Rotate the top counterclockwise||F2: Rotate the front clockwise twice|
The move is complete, and has swapped the bottom-front corner pieces.
Notice that it also changed the orientation of the top-front corner pieces,
but they are still in the correct location. We'll fix their orientation in Step 3.