Thank you for the answer, Sorry mabye i did not explain my self correctly.
I thought the idea of saving a site as a preset was to enable me to add a page or make a modification by choosing a preset color scheme withought the need to recreate an entire site.
Initially when i created my site, i added for example 10 pages and now i want to add a new page and modify my color scheme,
i thought i needed to go back to the site manager, select my preset that i saved and then simply select a different color scheme or add another page or delete a page, was i wrong ?
thank you