is there a way to input the exact uv coordinate for a vertex?

[ozukaru]

Im trying to export a texture that would be a square, I mean not typical uv islands of an unrwapped model but just a square (the only island is a square) that uses 100% of texture space, so in summary I need to give to the 4 vertex the exact uv textures (I tried to adjust manually (see attached image) but since when you pass the corner in the uv preview window there is not limit you con go further you cannot give precise position).

So upper left vertex should be 0,0,  upper right vertex should have 0,1, etc

 

got the idea? (sorry for my bad english)

 

Is there a way to do that?, now I just can select a vertex an move it, but how to give it and exact vector (x,y)? 

 

THANKS! 

 

edit: attached image to explain better

Edited October 3, 2015 by ozukaru

[ozukaru]

Temporary solution (workaround) , based in the fact that you can zoom (a lot!!) and adjust manually the vertex to the "very" corner!!, see attached image. This was enough and the result was almost perfect. 

Edited October 3, 2015 by ozukaru