To export a Google Doc as a PDF, open it and click File > Download > PDF document (.pdf). If the Doc has tabs, choose Current Tab or All Tabs and click Export. To set margins or a page range first, use File > Print and save as PDF. On Android, tap ⋮ > Share and export > Save as.
Google Docs can't export several separate Docs as one PDF on its own. Either paste each Doc into its own tab and use File > Download > PDF document (.pdf) > All Tabs, download each Doc as a PDF and join them with a free PDF merger, or merge them with the Merge Docs Pro add-on and save one PDF.
Google Docs has no built-in merge command, so you either copy each Doc into one file (or into its own tab) or use an add-on. With Merge Docs Pro, open Extensions > Merge Docs Pro > Merge Multiple Docs into One, select the files, and they are combined into a single Google Doc.
