Dynamic change shadow resolution

Hello
I’m try to learn UE and have first question
Please see shadow resolution on images
http://wstaw.org/m/2015/12/17/plasma-desktopBL4841.png
http://wstaw.org/m/2015/12/17/plasma-desktopAL4841.png
http://wstaw.org/m/2015/12/17/plasma-desktopwA4841.png
http://wstaw.org/m/2015/12/17/plasma-desktopHO4841.png

How to disable or increase distance of dynamic change shadow resolution?

ps: may be this is that bug Lightmap's building bug? - Rendering - Unreal Engine Forums