Hi M.

It is surely possible to add custom code to specific pages or to the whole website.

You can do so by making use of the Expert section at Step 2 for the whole site, or through Step 3 or 4 if you need it to appear on a specific page only.

Be careful though as the staff cannot provide support for the actual code you insert, but only as to where it is inserted, so be sure that you know what you're doing

Let me know if I can be of any further help

Thank you

Stefano