Resizing the columns is easy.  Here's how:

1) Move the cursor over a column line in the column title area.  You'll see the cursor change. 
 



2) When the cursor changes, hold down on the mouse button and move the column line to a new location.  In the example below, the right side of the column Hr Rate is being moved to make the column larger.
 



3) Release the mouse button.  That's it!
 



Note: if the column will not enlarge, first enlarge the TimeTracker document window, and try again.