class ActiveAdmin::Views::Pages::Index

def default_index_config

with each column displayed as well as all the default actions
Creates a default configuration for the resource class. This is a table 
def default_index_config
  @default_index_config ||= ::ActiveAdmin::PagePresenter.new(:as => :table) do |display|
    selectable_column
    id_column
    resource_class.content_columns.each do |col|
      column col.name.to_sym
    end
    default_actions
  end
end