Mant thks Paul!
On that links explain how to change Squarespace template 7.1?
https://litextension.com/blog/how-to-change-squarespace-template/#2-how-to-change-squarespace-template-7-1
So this not available anymore?
And have a look at the attached image, its 7.1 version and there is "Design" menu.
Thks in advance for your help!