Can't get smooth EDGES need help!

hey guys i got a DELL S2240L Monitor connected to my GTX 760. Currently im using 1920*1080p resolution but i can't get smooth edges over Icons and text. Games work fine but in windows i see stepping effects (when i lower the resolution Icone appeare fine.) plzzzz help me how can i get smooth display..

check the recommended resolution of your display, and if it is the correct res, then check the connections on your video cables.