How can I place vertices on the very center of the uv image? I am trying to move the selected vertices to slap onto the very center of the image, the resolution is 1000x1000 so I want it on the 500px mark. When I tried to center it myself I noticed that the black color on the right was starting to "leak" on to the edge as shown here, kind of hard to see but it's those black spots
There might be a better way, but here's a quick and dirty method:


In the UV/Image editor, select all vertices.
In the UV/Image editor's N-panel, set the UV vertex position to X: 500; Y: 500.
With all vertices still selected, scale 50% in the x-direction by tapping S, X, then typing ".5", Return.
In the N-panel, set the UV vertex position to X: 250.