page.data 

<nnt3:page.data /> 

Simplifies access to data from the pages table.

{nnt3:page.data()}
{nnt3:page.data(key:'nnp_contact', slide:1)}
{nnt3:page.data(key:'backend_layout_next_level', slide:1, override:'backend_layout')}

Important for slide to work: If a custom field has been added to the pages table, the field must first be registered in ext_localconf.php.

\nn\t3::Registry()->rootLineFields(['logo']);