> For the complete documentation index, see [llms.txt](https://docs.paragontruss.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.paragontruss.com/layout/layout-overview-1/interface-overview/layout-options-toolbar/pdf-underlay.md). # PDF Underlay {% embed url="" %}
Video Transcript  In this example, we'll bring in a PDF and use it to trace bearings. Select the pdf that you'd like to use as an underlay. For multi-page PDFs, you can choose the specific page to upload. We'll select page 3 for this example.  You can upload a PDF anytime throughout the project enabling you to easily view the locations of MEP accessories such as plumbing fixtures and HVAC ductwork.  Click upload. Once the PDF is uploaded. You can define the scale. For this example, we're going to pick our scale. We're going to zoom in to the dimension line, being very careful to select the correct point. Click to pick Point A. Pan over to select the second point, and again zoom in to make sure we select the correct snap point. Next, we'll define the distance between points. Referencing the actual PDF file, the dimension is 62 feet. Apply the scale. Next, pick our origin which is the point on the pdf to use as the origin for initial bearing input. Now, we are able to input bearings. Notice the bearing start point is anchored to the origin. Zoom and pan as-needed and click the endpoint to place the wall. Continue with the next wall. With the start point already selected, change wall thickness to 5 and a half inches. Click to place the wall. Launch into 3D to view the walls. Finally, let's remove the underlay. And that does it for this PDF Overlay overview.
Use PDF `Underlay` to upload a PDF at the beginning of a project to streamline wall input by tracing the pdf. Additionally, you can underlay a .pdf anytime throughout the project enabling you to easily view the locations of MEP accessories such as plumbing fixtures and HVAC ductwork. --- # 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.paragontruss.com/layout/layout-overview-1/interface-overview/layout-options-toolbar/pdf-underlay.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.