How to slide a vertex group to make new edge loop? I want to slide that vertex group like shown to make 2 new edge loops connecting to each other like a cylinder. Or transforming these 4 vertices into one edge loop would work out. How can I do so? 



Here in another perspective ^



That's what I really want on front ortho
Either use the Loop Cut and Slide operator Ctrl + R keyboard shortcut to manually place a cut on each side.



Or alternatively use the Bevel Edge operator on the whole existing edge loop CtrlB. Make sure you set the Bevel Profile factor to 1 so your current edge loop wont be moved