Rendering distance in editor... How to increase to see all textures without zooming

Hi there, having issue with texture rendering in editor mode if I wanna see texture I have to zoom right into the editor but then it doesnt render textures further on this only happening in editor mode… Any ideas? http://screenshooter.net/2608817/lxvgggr

Now I know its probably to do with the size of map I have but I need to find way of increasing texture visibility distance its making my texturing work hell…

I take it its to do with basemap distance but is there way to go over 2000

Maybe change mip settings for the bitmap