# About

This section contains guides on selected Trusted Twin features.

Guide Contents
Custom headers Learn how to enhance the rule functionality through variables passed by the user in a request to the Trusted Twin API.
Rules (Entry visibility) Learn how to manage visibility of data from the resource perspective on the example of Ledger Entries.
Rules (Twin rule) Learn how to manage visibility of data from the user perspective on the example of the "twin" rule in a role.

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