Print your invoices like you normally would, except when you see the "output options" screen, change the setting from "Printer" to "File" and set the format to Adobe Acrobat (PDF). If you don't see this option it means that you just need to download the latest "Gopher Update" from: http://getgopher.com/index.cgi?ref=null&page=download
Found this thread using the Search function. However, after saving the estimate or invoice in PDF, there is no mention of where to look for it in the computer to attach to the email I want to send. Pls. advise.
After careful inspection of the window where you choose to save to a PDF file I see the disk icon to be clicked to save the file. I pushed the OK button where it is automatically saved under the Gopher folder which is found in the Program Files section of the C drive.