How to Flatten PDF in Adobe InDesign

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Here’s a simple, step-by-step guide on how to flatten PDF in Adobe InDesign:

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1. To flatten a PDF in InDesign, click ‘File’ in the top menu.
2. Select ‘Adobe PDF Presets’ and choose the ‘PDF/X-1a:2001’ preset.
3. The Export dialog box will open. Review the file name and choose where the file will be saved, then click ‘Save’ when finished.
4. A final dialog box will open. Ensure that Compatibility is set to ‘Acrobat 4 (PDF 1.3),’ then click ‘Export’ to flatten your PDF.