Cropped content inside frames becomes visible on older mobile PDF viewers.
I found a rendering issue in InDesign 2021 (and potentially newer versions). When an image or PDF is placed inside a frame (cropped), the content outside the frame boundaries is still being rendered on older mobile devices' PDF viewers.
Steps to reproduce:
- Place a large PDF/Image inside a smaller InDesign frame.
- Export as a standard PDF (Interactive or Print - High Quality).
- View the PDF on an older smartphone (e.g., older Android/iOS built-in viewers).
- The "hidden" parts outside the frame are visible.
The content outside the frame should be completely clipped or removed from the render stream to ensure privacy and visual consistency across all devices.
Exporting as PDF/X-1a:2001 solves the issue because it flattens the transparency/layers.
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Nurdoğan GÜNER
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