The nose of the fuselage is flat on top. Making it a bit more rounded improves the airplane’s appearance.
Set up the lesson:
Improve the curvature of the top front portion of the fuselage:
+click to select the three ridgeline edges in front of the cockpit, and the ridgeline edge immediately behind it.
+click to deselect it. 


Front view
Increase the curvature at the top of the engine cowl:
+click to select the three vertices along the top of the engine cowl. 


Front view
Edit panel, turn on Now the fuselage is convincingly rounded.

Save your work: