First things first, we prepare your design files for manufacturing using an automated software pipeline, if you have any questions or want to make remarks, please contact our support before ordering, as we do not read notes included in your project files.
Open up your PCB file and make sure all planes and polygons are updated, make sure to run the DRC to catch any errors, if there are any, please resolve them.
If that is done, navigate to Fabrication Outputs -> ODB++
Add a job name or leave it blank to use the project name, then select either Tarball (.tgz) or ZIP archive (.zip) as output option. Select the filename and output path, press Generate to save the ODB++ file.
After we processed the ODB++ file you can inspect the boards using our board viewer.
We give a rendering guarantee that the boards are manufactured as displayed in our viewer. You can read this article if you are unsure how to use our board viewer or if you want to know how the rendering guarantee works.