Check your document before exporting!
Before creating a PDF for a service provider, make sure that the InDesign document meets your service provider’s specifications. The following list offers some recommendations: Use the InDesign Preflight feature to ensure that image resolution and color spaces are correct, that fonts are available and can be embedded, that graphics are up-to-date, and so on. View your Adobe PDF export settings before exporting, and then adjust them as necessary. The Summary area includes a warning section that indicates when preset settings can’t be honored. If your artwork contains transparency (including overprints and drop shadows) and you require high‑resolution output, it’s a good idea to preview the effects of flattening using the Flattener [...]