In administration I see that you can modify existing page structures and make new page structures... but can you delete existing page structures (not just pages within a page structure but the whole thing)?

In program design, I think it should permanently add page structures because if admin delete page structure that client have use, it make the error. And then I did not add a function for delete page structure.

If admin need to delete page structure, admin can delete in database.

Delete page strcuture method :
1. login as root.
2. go to phpMyAdmin.
3. open 'rvsitebuilder' database.
4. Browse table 'rvs_admin_layout'
5. select page structure record and delete