Ah, thanks.  I hadn't noticed the "show internal structure" choice.
The tool I used to use just did that normally.  (I thought things looked a bit 
odd...)

From: Tilman Hausherr <thaush...@t-online.de>
Sent: Wednesday, January 4, 2023 10:29 AM
To: users@pdfbox.apache.org
Subject: Re: Optional Content Groups

[EXTERNAL]
On 04.01.2023 19:22, John Lussmyer wrote:

I have a pdf with several Optional Content groups.

I can find their definitions in the Page/Resources/Properties dictionary, but I 
don't see how they are enabled or disabled.

Where is that controlled?

This is below the document root, use PDFDebugger to look at it (first click 
"view", "show internal structure"). To learn more, you'll have to read the PDF 
specification, although some can be understood by looking at the structure 
below. This is from the file at 
https://issues.apache.org/jira/browse/PDFBOX-5524<https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fissues.apache.org%2Fjira%2Fbrowse%2FPDFBOX-5524&data=05%7C01%7CJohn.Lussmyer%40efi.com%7C2147e215b0b340ca7e7008daee8194fe%7C3fe4532499b245c397517034bae71475%7C0%7C1%7C638084537602543858%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000%7C%7C%7C&sdata=ykSglpshnvSasNgiDQmpJCt1T3t8JdYmD7Q7o9o69ow%3D&reserved=0>
 which has two "off" OCGs

[cid:image001.png@01D92029.9F0E9020]

[cid:image002.png@01D92029.9F0E9020]

Tilman

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