To see the source text, double-click on the line in question. Here, I clicked on the highlighted line containing wherefore art thou Romeo.

       

       

 

       

 

or press F8 and the lines grow fatter:

 

       

 

or pull the line you're interested in wider or fatter: place your cursor at the bottom of the number in the left column, and it changes shape:        

 

       

 

and pull it down. You can also pull any column wider or narrower.