How to change theme

Hello Team,


Now i want to change theme of nopCommerce.
How it can be do ? please suggest me.

Thanks

You can always change your theme related settings from http://admin-demo.nopcommerce.com/Admin/Setting/GeneralCommon page.

Thanks for reply,

But here i can see only one option that is "default clean".
I want to customize both (adim and user ) .
That whole template's means GUI of both application.


And,whenever i am  trying to do change here it shown me "For security purposes, the feature you have requested is not available on the demo site" error message.

This is official nopCommerce admin demo site which doesn't allow to change this type of features.
You can always try this features by downloading nopCommerce on your system.
And you have to make new theme or edit existing them if you want to change UI. For that please try this link https://www.nopcommerce.com/docs/72/designers-guide.aspx