Hello, I have a arcade website which got a PR 4 yesterday`s PR update. It also ranks 7 in google for my keyword. I am thinking of changing it design so that it looks more professional. But I am wondering that changing the design may affect the ranking and PR? could you people suggest me something? Thanks in advance.
The design should not affect the ranking in any way. Try to keep the key elements the same eg content, links, meta tags, title, filename for every page and you will be fine.