I am trying to use the dashboard for boosting but for value boost it's using the default add operation and no way to customise in the dashboard to use multiply operation. Can you kindly help with this.
Found a solution to configure the operation via the
search_settings API endpoint.
The "Multiply" operation is available through the Dashboard as well. On the Relevance Tuning page, for a "Number" type field, under "Add Boost", pick "Functional", and change the operation from "Add" to "Multiply".