Thanks for your quick response.
I would mainly like the ability to edit the pages of:
Store: with the possibility of editing the number of products by rows and columns, the colors and shapes of the buttons and the navigation bar between the sheets of the store, in addition and the possibility of placing a side menu and a search engine when it is displayed on PC.
Shopping Cart, Checkout Page and Account Page: the ability to choose the colors of the background, tables, text and buttons, square or rounded corners and the thickness of objects and letters.
Product page: font and button sizes, background and object colors, number of related articles, and device layout.
Header: selectable icons of the shopping cart, adaptive menu for cell phones with category or brand options and the possibility of adding a search engine.