You can activate the variation board by right-clicking in the engine window and selecting "Variation board" from the popup menu.

 

The size of the variation board will vary with the size of the engine pane. The purpose of the variation board is to allow you to play through the best variation the engine has found thus far in its search.

 

 

You'll notice a set of VCR buttons below the variation board; these are your controls for playing through moves on this board.

 

You can step forward and backward through the variation one move at a time by using the single arrow VCR buttons.

 

If you want to jump right to the beginning or end of a variation, you can use the double arrow buttons for that purpose.