Hi Tom

You can use @Model.MacroParameters["paramAlias"] to get the value - It's the same whether you're using dymaic or strongly typed.

Then you can use either @Umbraco.TypedContent(id) (Strongly typed) or @Umbraco.Content(id) (Dynamic).

So you should be able to write something like this when using strongly typed

@{
   var idFromParam = @Model.MacroParameters["yourId"];
   var item = @Umbraco.TypedContent(idFromParam);
}

@item.GetPropertyValue("header")

It's always a good idea to have this reference nearby when dealing with Razor btw :) https://our.umbraco.org/projects/developer-tools/umbraco-v6-mvc-razor-cheatsheets

I hope this helps!

/Jan