Smart collections criteria for Bookpedia

[ggianni]

Hello
I'm new to Bookpedia, may be the answer to my question is written somewhere but I can not find it.
In a Smart collection I need to add a criteria that test if a field is empty.
How can I do it ?
Tank you in advance for any help.

Gianni

[Conor]

Hi Gianni,

Welcome to Bookpedia. To test empty values in a smart collection simply leave the final field blank. "Author is [no writing]".