How to return to display visual upgrade options back after you commit to the new SP2010 visual style

 

from the site settings / title, description and icon

if you choose “use the new SharePoint user interface,  and don't ask me again”

but you changed your mind and said “oh no no i want to go back to v3 visual style", what do i do now ? “

solution:

open power shell

$myweb = $GetSPWeb https://localhost/sites/department1

$myweb.uiversionconfigurationenabled = $true

$myweb.update()

goto site settings now and you will find the visual upgrade option shown