I open all PDF files just fine. After anywhere from 20 mins to an a couple hours I will receive an error "Insufficient data for an image" and the document goes blank - all pages are white. If I have multiple PDFs open the same thing happens to other files, though may get different error such as "There was an error while reading a stream." but all pages similarly go blank. Have to close all and reopen. Files may or may not have comments in them. Seems to happen to any and all files.

Running Windows 10 Pro, 32 Gb Ram 64-bit 3.6Ghz
Adobe Acrobat Pro DC (19.010.20098)
No updates available.
Can Generate System Report if needed.

This recent update is extremely frustrating. It dropped off tools that were in my toolbar previously (page view/zoom options disappeared) and I had to figure out how to get them back.

Not only is the comments bar is now uglier/bulkier, when you have sorted comments to not include ones marked as completed it no longer dynamically removes the comments you mark as you go. You now have to go back and clear your comment filter and reapply "none" to hide completed comments.

To add insult to injury, there is no longer an option for other versions in ACC, so I can't just roll back to a better version.

1. Brief Title

Losing german äüö (Umlauts) and letters in the Structure Tree when using "Add Tags to Document" in Adobe Acrobat DC (previous operation Number ADB-3207012-T1M7) German Language Problem?

1. Steps to reproduce the issue

Export a text document with german words that contain german umlauts (äöü), e.G.: "für, können, öfter, mögen" as a PDF without tags from InDesign or Word
Open the file in Acrobat DC
Go to "Tags" and open the little menu and choose "Add Tags to Document"
After the Structure Tree was created — save and close
when you open the document again in Acrobat DC and you can take a look at the tags in the Structure Tree and see that the letters are missing in the tags. Not only the umlauts but sometimes accompanying letters aswell
Examples: "für" -> "fr"; "können" -> "knen"
Conclusion: blind people can't read these anymore and the document is not accessible anymore!

The problem doesn't exist in Acrobat X and Acrobat XI.
The problem occurs with any font and all operating systems.
The problem was already documented with video and example-documents with the operation Number ADB-3207012-T1M7.

1. Operating system

The error occurs in all operating systems.

1. Expected results

Loss free texts in the Structure Tree with umlauts and all other letters so that the docment can be read by screen-readers.

1. Observed result

Missing letters in the Structure Tree after using "Add tags to Document" mainly in combination with Umlauts äöü and umlaut-ligatures.

It's pointless to customize and 'show' tool icons in the toolbar, because those tools that I want and use are hidden under the 3 dots. And that happens because Home, Tools, Document, and My Account is stuck permanently and uselessly in the toolbar.

I have set the program to open multiple files in separate windows, so I don't need the Document tab. The Tools sidebar can be opened by clicking in the margin at the edge of the window, so I don't need that. And if users need to open and close files within the program (can't understand why), then put a non-intrusive Home button somewhere that doesn't eat up needed space in the toolbar. Idea: Make those tabs disable-able so we can use the toolbar for what it was originally intended.

The comments pane takes up WAY too much space. I would like the ability to customize what I see there.

Currently in the Comments pane, it display the:

-Author Name
-Type of Comment
-Text within the pop-up note
-Date and Time

Sometimes all of this information is useful, but most of the time, I don't need to see all that! It is a waste of screen space. I would like the ability to show to only those options which I need. In this case, I just want to see what is in the pop-up note, nothing more.

We can customize certain panels in InDesign (like the Links panel), and here in Acrobat it would help maximize screen space if we could hide those items which we don not need to see.

Compare the same set of comments in four different versions of Acrobat. Version 9 had a sub-level of collapsing, which hid the date, time, and type of comment. That feature was eliminated (or not developed) in later versions, and so now we have no choice but to always have the various items showing.

It takes up way too much space.

1 Copyedits made in a comment format are nearly impossible to copy and paste
2 Receive PDF with comments.Select text in comment, either in popup window or in sidebar list, and copy to clipboard. Check clipboard contents: empty.
3 Any version of DC, Mac platform. Have deleted files, the application, all Adobe software, reinstalled. Created new user profile. Purchased a NEW COMPUTER and installed DC. The problem is OS-, file- and device-independent.
4 Expected result: copying text would result in it being copied to the clipboard.
5. Observed result: nothing is copied. Has been the case since the initial release of DC. Pro works fine.

When I scan two pages and crop them, they are smaller or equal to an 8.5 x 11 sheet of paper. I want to be able to take the two pages and make them just one single page. There are many times that I have scanned something that had just a couple lines at the top of the second page. I may want to be able to shrink that to fit it all on one page. I think there should be options for doing that. Since people are trying to be more and more digital to store information and use tablets, these features are needed to be able to get away from paper.