> For the complete documentation index, see [llms.txt](https://docs.dietrichs.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.dietrichs.com/dietrichs-intelligent-documentation/docs-de-en/2d-auxiliary-geometry/zeichenfunktionen/linien.md). # Lines The line input of the “Auxiliary Geometry” menu enables the definition of free lines and polylines. These lines can be used, for example, as reference lines for entering interior walls in the “Floor Plan” model area or as references for defining a free ceiling opening in the “Ceiling Field” model area. All familiar graphical and temporary aids are available for creating lines in the model area. In addition, the “Auxiliary Geometry – Edit” functions provide extensive options for further processing. A further description of the editing functions can be found in this help under “Auxiliary Geometry -- Edit.” Auxiliary geometries created within a building are also managed with the building. Thus, auxiliary geometries created, for example, on the ground floor can be hidden for further work on other storeys. The selection of visible auxiliary geometries is made via the menu item ‘File - Settings - Display’. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## 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, and the optional `goal` query parameter: ``` GET https://docs.dietrichs.com/dietrichs-intelligent-documentation/docs-de-en/2d-auxiliary-geometry/zeichenfunktionen/linien.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. 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.