To make the left or right pane wider or narrower, point to the divider between the two frames. When the pointer changes to a double-headed arrow, hold down the left mouse button as you drag the divider right or left.
To proportionally shrink or enlarge the whole Help window, point to any corner of the Help window. When the pointer changes to a double-headed arrow, hold down the left mouse button as you drag the corner.
To change the height or width of the Help window, point to the top, bottom, left, or right edge of the Help window. When the pointer changes to a double-headed arrow, hold down the left mouse button as you drag the side.