Android PDF reader - beta tester

edited October 16, 2026
Idk if something was changed with the reader, but now using a stylus on android does not highlight smoothly on PDF
  • Have you been on the beta this whole time? When you did you notice this change?
  • Yes. I haven't used Zotero android in a few days; noticed it today. The menu that pops up is also changed
    https://s3.amazonaws.com/zotero.org/images/forums/u19254075/bxbgs49alrijemfsygvj.jpg
    https://photos.app.goo.gl/d6cTEznwrPd63DF48
  • Function is severely impaired. Unenrolled from beta testing for now
  • DimaP Zotero Team
    May you please let me download a PDF you are having this issue with?
  • edited 24 days ago
    invited you to group
  • DimaP Zotero Team
    Can you please double check the document you shared? The wording before and after the word "Introduction" seems to be different from what you have a screenshot of.
  • I encountered the issue with all pdfs. But I shared the example from this post.
  • DimaP Zotero Team
    edited 23 days ago
    Can you upload the actual PDF to the shared library? Because right now there is an item with a URL, which doesn't work for some reason
  • I uploaded the PDF to the shared library and messaged you a link to the file shared from my google drive.
  • DimaP Zotero Team
    edited 23 days ago
    Thank you!
    Important nuance - when you try to highlight the text on Android by opening a pdf from Items List you are opening it on our New Reader implementation.
    But when you open the same PDF by first clicking on 'i' to go to Item Details screen you are opening it via now deprecated Nutrient implementation.
    It's not our intention to allow users to be able to open the PDF via 2 different implementations, so it's a bug and will be fixed in a new build, so that only New Reader implementation is used via both routes.
    Interestingly, our Reader performs much better and has much less artifacts on the PDF you've linked during highlighting.
    But there are still places where it's not highlighting an entire word, but this is because I think the PDF itself is broken. I think this way, because if you were to try just selecting text on Google Chrome's default PDF reader you will see that it also not able to select all the text and excludes random parts.

    You mention you have lots of PDFs that have issues like that, so can you please:
    1. Open the PDF in some 3rd party PDF viewer like Adobe or Chrome's and first confirm, by selecting text, that it doesn't have artifacts.
    2. Open that PDF in Zotero Android App _via the Items List page_(to use New Reader) and see if artifcats appear there during text selection and highlighting?
    3. Share those PDFs with me via similar way as you did before.
  • DimaP Zotero Team
    edited 23 days ago
    Everything I mentioned earlier is only relevant for Android build 1.0.0-289 and higher, which currently only exist in Beta. So please also double check your app's version.
  • Chiming in to confirm that highlighting in the new implementation is broken here, too (Boox Note Max, Zotero 1.0.0-289, through the beta program).

    I've tested two PDFs. The older, deprecated reader that can be accessed through the information tab works as expected. The new reader highlights very poorly in both tested PDFs: cannot reliably identify the word being selected, is extremely "jumpy" when dragging to select text. It's basically unusuable. It is so twitchy and sensitive that you have to be extremely careful when dragging, and it always takes more than one try (and usually you have to settle for selecting more or less text than you wanted.)
  • dstillman Zotero Team
    Please send affected files to support@zotero.org with a link to this thread.
  • @dstillman The zotero app (1.0.0-289) is showing similar issues in my samsung tab. Earlier, when stylus is there palm rejection feature was working. But now the palm rejection is not working. During highlighting or annotating, the lines draw where ever our hands touch on the screen, which was not happening before. Also the undo and redo buttons is also missing from the ui.
  • edited 9 days ago
    I am on the latest version (Nov 1, 1.0.0-292) and unfortunately it is still quite buggy: inaccurate text selection (often, the text selection area is one word behind or ahead of the word under my finger), it is still glitchy/twitchy, and now it only sometimes displays the popup window for text selection. Sometimes, if I drag text to select it, only the handles for adjusting the text area are visible, not the dialog to highlight/underline, etc. I'll send another pdf to the support address.

    Unfortunately, it seems that you fixed the bug that allowed access to the deprecated reader. It's quite difficult to use Zotero now for highlighting...
  • The palm rejection feature is now working as expected. But the erasing of annotation is not working now. When I try to erase something, it just show up after a second. A googledrive link with the screenshot is attached for the reference.

    (https://drive.google.com/file/d/1HPj_OtXtBLUBE_uttoWN4XVYk3KDBYSA/view?usp=drivesdk)
  • One thing I've noticed is that when I turn on a highlighting/underlining mode while reading, from the annotation tray, text selection is much, much smoother and less glitchy. It works fine. The only downside to this is that sometimes while trying to scroll the page text will be highlighted inadvertently. 95%+ of the time, though, if I keep the page margin visible while reading, I can touch in the margin to scroll and no text is highlighted.
  • The annotations are displaying some issues. For instance, when we type one letter, it appears to be smooth, but when we transition to the next letter, the first letter appears to be pixilated. It seems that the application does not like smoother lines and prefers rough ones.
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