Custom properties can be add to the search index by enabling the `
queryable` flag in the Admin Console in Optimizely <<product-name>>. Custom properties will then be treated as text and are added to the `
PrefixMatch` and `
PhraseMatch` queries during search.
Define custom property in the Application Dictionary (see Related topics below).
Go to **Admin Console** \> **Marketing** \> **_Search_** \> **Field Boosting**.
Find the custom property.
Edit the custom property.
Change **Queryable** to **Yes**.
Adjust boost value as desired.
Rebuild the Elasticsearch index.