As per topic in discussed, I've no idea to turn off spaces turn into dotted line happened in designer view and no luck when try using CTRL+R,ctrl+W (It is working only on markup view) or convert everything into installation default by using "tools->Import and Export Settings..".
I'd attached picture for more details.Hope someone could help me in this question.Thanks
I'd attached picture for more details.Hope someone could help me in this question.Thanks