How to move one edge's vertice without interrupting other mesh - Here on picture, how can I make one more white vertice and slide it to the right to make 2 squares instead of this weird looking n-gons.
EDIT: Here on picture you see I have selected one edge, and it has 2 vertices. That edge seperates mesh in 2 weird n-gons. Left one is triangle(marked as "1." at picture I uploaded), right one is some weird quadrangle. I want them to become 2 squares(something as close as marked in picture "2."), obviously by adding one vertice more but don't know exactly how.
Also, how can I make edge loop to continue through this n-gon, beacuse as you can see it stopped right top of orange vertice.
EDIT: I marked with red dashed line on the picture where I want to cut mesh, but can't do it with CTRL+R. P.S.: sorry for the unclear information, but I am pretty new to Blender so I don't know proper vocabulary for those problems. Hope now it is little bit clearer.