The pdf document contained image masks that were not downsampled

[lionelr93521436]

I am trying to Optimize or reduce a fillable PDF form with images, but every time a warning pop up come with "the pdf document contained image mask that were not downsampled".

I am using Acrobat Pro DC Version 2018.009.20044.

Please Need Help.

Thanks

[Test Screen Name]

Do you feel this is stopping the size reduction you want? 

[lionelr93521436]

It does not reduced at all.

[Test Screen Name]

What does AUDIT SPACE USAGE show as the main users of space? And the pictures on this page? Are they black/one colour, or normal multicolour?

[lionelr93521436]

I make this form for reports.

This is for one report only.

[Adorobat]

Hi Lionelr,

You may try flattening transparency and then save pdf as optimized pdf as the following thread suggests and see if that works:

“the PDF document contained image masks that were not downsampled."

You may also visit the following forum threads which discuss the similar issue:

I am unable to create a reduced size PDF

How can I reduce the size images on a PDF?

Thanks,

Shivam