Internal PDF Viewer has fixed default zoom
Reported by
m...@pschumann.de,
May 29 2017
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Issue descriptionUserAgent: Mozilla/5.0 (X11; CrOS x86_64 9334.72.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.140 Safari/537.36 Platform: 9334.72.0 (Official Build) stable-channel guado Steps to reproduce the problem: 1. open pdf from internal file manager 'files' 2. 3. What is the expected behavior? Default Zoom of pdf should be adapted to monitor size or at least remember last zoom or offer an option to customize default value, since 10"-14" monitors are history, there are now chromeboxes with connected monitors (> 21"). What went wrong? The pdf is viewed too small on 23" monitor. The viewer also doesn't remember last zoom. So every opened pdf must be zoomed in multiple times (very annoying). Did this work before? N/A Chrome version: 58.0.3029.140 Channel: stable OS Version: 9334.72.0 Flash Version: Shockwave Flash 25.0 r0
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Jun 2 2017
Issue 727411 has been merged into this issue.
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Jun 2 2017
a) What's the resolution of the monitor? Using a 1080p 24" monitor, the default zoom for PDFs is reasonable. b) Does the problem occur with all PDFs, or only a particular PDF? Also, maybe something got lost in translation, but 10"-14" monitors are not obsolete.
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Jun 3 2017
a) 1920x1080 b) sorry I dont' mean it like that. 10-14" is the monitor size of chromebooks and are definitely not obsolete. But for chromeboxes nobody would use such small screen, rather 23"+. You're right. DinA4 PDFs are not the Problem. But most time I'm working with PDFs, that contain only slides and then it is too small as seen in the appended image. c) every pdf viewer I know has that option even the minimalistic ones.
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Jun 3 2017
Thank you for providing more feedback. Adding requester "thestig@chromium.org" to the cc list and removing "Needs-Feedback" label. For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot
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Jun 26 2017
Can you please attach a PDF which shows the given issue? Since it isn't all PDFs this seems like an issue with the document?
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Jun 26 2017
Using a rotated 1600x2560 display and a typical pdf like https://www.martinfowler.com/apsupp/spec.pdf I'd also appreciate if the default zoom type was remembered (like fit-to-width or fit-to-height or fit-page).
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Jun 26 2017
Just a usual pdf, that contain slides: https://www2.htw-dresden.de/~robge/bs2/vl/bs2-01-einfuehrung.pdf
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Jun 26 2017
Thank you for providing more feedback. Adding requester "dsinclair@chromium.org" to the cc list and removing "Needs-Feedback" label. For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot
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Jun 26 2017
+tbuckley, +raymes for any context on how the default PDF display level was chosen?
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Jun 26 2017
I think it's possible Chrome tries to match the real world size of the pages. The slide size in PDF from c#8 is 128x96 mm, which loosely corresponds to my measurements with a real ruler. However, if that's the case, it's not the best approach. Adobe Reader, the (most?) popular PDF viewer application, opens that pdf in fit-page mode, and can be switched to Chrome-like continuous page flow, see the attachments.
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Jun 26 2017
Actually, it would make sense to fit the entire page by default AND display a vertical strip of page thumbnails on the right or left. Adobe Reader and other pdf viewers offer this feature for like decades, right?
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Jun 27 2017
We just followed the algorithm that had existed since long ago. It's in Viewport.setDocumentDimensions. The initial zoom is set to be the min of the default zoom and the zoom that would be used for fit-to-width. The default zoom is meant to be Chrome's notion of the default.
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Jul 10 2017
Seems this is a feature request , marking it as 'Untriaged' to get more inputs from dev. Thanks..!!
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Jul 18 2017
On a 30" monitor, fit-to-width would zoom in way too much. Even on a 24" monitor, whilst it may help for presentations whose page size was chosen poorly, it's likely to zoom in too much for documents. Unless there's a reliable way to distinguish presentations from documents, the current behavior seems optimal here. Users that prefer everything to be rendered larger all the time should consider increasing their Chrome Settings > Appearance > Page Zoom (this'll also make web page content larger).
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Jul 18 2017
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Jul 19 2017
>On a 30" monitor, fit-to-width would zoom in way too much >Unless there's a reliable way to distinguish presentations from documents, the current behavior seems optimal here. Fit-to-width is just one of the three standard zoom modes. Fit-page or Fit-to-height can be selected depending on the display resolution and page orientation so no need to determine if PDF is a document or presentation, I think. >Users that prefer everything to be rendered larger IDK about other users, but I almost never use page scaling and AFAICT the reported problem is that all normal pages in Chrome remember last used zoom level, but PDF viewer doesn't, which is a [significant] part of the reported problem, and hopefully easy to fix.
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Oct 11 2017
Sending over to dsinclair@ to triage appropriately.
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Nov 7 2017
This sounds like a ProductExcellence issue, hnakashima@ can triage for that effort.
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Aug 1
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Oct 12
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Comment 1 by abodenha@chromium.org
, Jun 2 2017Labels: -Type-Bug -OS-Chrome OS-All Type-Feature