# External Tools This page lets you configure certain external tools which are used by various functions. If you don't configure these the default tools will be used. * **Text viewer**: The text viewer is used when double-clicking on an unknown file type. * **Script editor**: The [script IDE](https://chaoses-ib.gitbook.io/directory-opus/manual/scripting/script_editor) can be configured to use an external editor rather than the internal one. --- # 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://chaoses-ib.gitbook.io/directory-opus/manual/preferences/preferences_categories/miscellaneous/external_tools.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.