This will show you how to place partial templates into separate files, and how to put functions you need in many places in separate files as well. It focuses on:

1. @Html.Partial(...) to render another page (older versions of 2sxc used @RenderPage(...)) - see docs
2. Func<dynamic, dynamic> micro-helpers are ideal for small sub-templates - see docs

When Using other Razor or Code, you should also know:

1. Model is the typed object used in sub-pages to receive parameters from the caller - see docs
2. MyModel is the generic object used in sub-pages to receive parameters from the caller - see docs
3. To get a helper, just use new Helper(...) or GetService<HelperType>()
4. GetCode(...) to create objects from .cs files sometimes still works, but is not recommended - see docs