# Appender Properties As we mentioned before, LogBox ships with over 10 different appenders for your logging and tracing needs. Some of them require configuration properties and some don't. We already discovered that when we configure an appender we can pass in a structure of properties much like how we configure ColdBox Interceptors. Each appender can implement as many properties as they see fit. We will digest all the included LogBox appenders and their configuration properties. ## Async Property All appenders have an `async` boolean property by default inherited from LogBox. This will tell LogBox to log asynchronously in a separate thread. By default all logging is done **synchronously** --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://logbox.ortusbooks.com/5.x/usage/appender-properties.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.