Blender 2.8: I want to select the whole image for each face of a cube I am super new to Blender and I am having trouble with there being a lot of information on the web that does not apply to 2.8. I am hoping this will be simple.

Here is my cube and my texture:


See the little orange square that shows what portion of my texture is on my cube face? How do I make that the whole texture and not just that little part? I tried hilighting the vertexes and dragging them to the corners, but I cannot seem to be precise enough, I end up with corners that are slightly off... There must be a better way?
The easiest way to do what you want would be to go into Edit Mode, select all, press the U key and then select Cube Projection.



This will unwrap your cube and overlay all faces on top of each other, completely filling the UV texture space.