If you're using Adobe InDesign to produce your content, then you should consider using these PDF Export settings before uploading the PDF to Vitrium. Afterwards, we also recommend that you further optimize the resulting PDF using Adobe Acrobat's advanced optimization settings. 

You can manually create a preset by referencing the screen prints below or you can simply import same by downloading this joboptions file and loading it into your InDesign application. Here's how to import the settings:

To import an Adobe PDF Preset (Windows):
1. File->Adobe PDF Presets->Define
2. Click LOAD button, browse and select the *.joboptions file that you want to import

If you want to share your settings with someone else, then here's how to export the settings:

To export an Adobe PDF Preset (Windows):
1. File->Adobe PDF Presets->Define
2. Scroll to select the setting to be exported and then click SAVE AS and give it a filename keeping the extension .joboptions.

To manually define settings, simply clone these settings in your environment:

If you find that these InDesign PDF export settings are not helpful in resolving the Web Viewer presentation, then please reach out to us at support@vitrium.com and provide us the details of the issue.