Can I add custom Schema properties to the JSON-LD?

The Social and Search Optimization metabox allows you to customize several Schema property values based on the Schema Type you choose, but if you need to include additional properties, you can use the [schema] shortcode to manage the value of each property individually.

Remember to submit the webpage URL to the Google Structured Data Testing Tool to validate your customized Schema property values.

Note that a related article, Going Beyond The Options – The Schema Shortcode was published on June 28th, 2018.