You can generate a PDF file from a layout by plotting it to an AutoCAD PDF plotter.
Near the bottom-left of the drawing area, click the layout tab.
Click Output tabPlot panelPlot. Find
In the Plot dialog box, under Printer/Plotter, in the Name box, select the most appropriate AutoCAD PDF plotter configuration (PC3 file) for your requirement.
Note: The system ships with several AutoCAD PDF PC3 files that are preset to generate PDF files customized for the purpose identified by the PC3 file name. For example, the AutoCAD PDF (Web and Mobile) PC3 file produces PDF files optimized for viewing on mobile devices and Web browsers.
Select paper size, plot area, plot scale, orientation, and other options.
Click OK.
In the Browse for Plot File dialog box, select a location and enter a file name for the PDF file.