While the width of each wallboard is set automatically, you can resize each wallboard separately using the small resize icon in the bottom right hand corner of each wallboard.

 

Drag the icon up or down to change the height of the wallboard. Individual wallboards can have different heights, as shown below

 

 

But each row of wallboards has the same height as the tallest wallboard in that row, so subsequent rows are drawn below the tallest wallboard, as you can see in the gap between 'Skill 41' and 'Skill 43' above.

 

If the wallboard height makes it overflow the browser window, scroll bars will be displayed. Wallboards have to be resized individually, it's not possible to globally change the height of all wallboards across the board.