Hello,
coming from MODx, one of the most powerfull items in MODx are TemplateVariables (TV's). Basically you can add properties/fields of different types (ie texfield, WYSIWYG field, dropdown, checkbox, etc.) to a template from within the manager. Now all pages that use this template show the added TV's for editing. This is a very quick way for non-programmers to add f.e. extra content to a page.
Is something like this also available in Silverstripe?
cheers, Olaf