Hi @asa2022 ,What kind of code snippet you want to add? It it any
script? Pre-assuming,If it's script eg. Google Tag Manager code which
you wants to include in all pages automatically, In that case, your
option is some form of component instance on every page, &If some
exceptional case where the author doesn't want it then component's
dialog.xml has a simple include GTM/don't include GTM checkbox.ORYou
should use inheritance to achieve this. usually we got a so called
"abstract" or "base" templa...