The scale of the viewing tile can be adjusted. You can do this by using the buttons in the upper right-hand part of the active viewing tile:

1. — enlarges the viewing tile;
   
   

   This button becomes inaccessible when the tile is maximized

   
   

2.  — reduces the size of the viewing tile.
   
   

   This button becomes inaccessible when the tile is minimized

You can also use the mouse to scale the viewing tile. If the viewing tile is maximized to fill the entire screen, a double left-click of your mouse within the tile area will minimize the tile. Otherwise a double left-click will maximize the viewing tile to fill the entire screen.