How to add conditions to fields in CX Sales Mobile App

Summary:

In the CX Sales Mobile App I want to hide a Picklist when a Checkbox is not True.

Content (please ensure you mask any confidential information):

I tried to enter the according groovy script as a mobile script but it did not work. Where exaclty should the values be placed and what is the trigger if this funcionality should be available in all contact views.

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):

if (Fieldname_c == 'Y') {return true} else {return false}