Created attachment 119477 [details] Can not really change page color SUMMARY I want to change the page color to light yellow to relieve eye fatigue, but I find out the page color do not really change. In attached file, I change the page color to green, but only left and right side change the color to green, the part has words do not change at all. This behavior make 'change page color' useless I think. If I choose 'reverse color' the whole backgroud change and the words color become white. so I think 'change page color' is practicable. STEPS TO REPRODUCE 1. Configure Okular->Accessibility->Change colors->Change page color 2. Choose a color you like OBSERVED RESULT The page color do not really change, important part of the page's color do not change. EXPECTED RESULT whole page color change to color I set SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: (available in About System) KDE Plasma Version: KDE Frameworks Version: Qt Version: ADDITIONAL INFORMATION
(In reply to widon1104 from comment #0) > In attached file, I change the page color to green, but only left and right > side change the color to green, the part has words do not change at all. Can you please attach the actual file that you have opened in Okular in addition (attachment shows the screenshot)?
Created attachment 119479 [details] the pdf file The pdf file attached.
Thanks.
It does change the paper color, you can clearly see the paper color is now blue https://i.imgur.com/7jEXLiu.png What we can't change is the fact that there's a big white rectangle as part of the page contents.
Created attachment 119493 [details] win10 adobe reader success change backgroud color I use win10 adobe reader success change the same document background color to green. Please do not close this bug so quickly.
Finally I find out a software support linux called foxit which can change background color successfully. You can download foxit reader in: https://www.foxitsoftware.com/pdf-reader/ After install this software you can use Edit->preference->General->Page Background to change the background color to the document I upload foxit reader satisfy my need, but this software no longger update for a long time. I still hope okular can fix this bug.
This is a bug does not fix yet.
It's not a bug, if it makes you happy this is open, let's just leave it open
Do you try foxit reader ? This software change backgroud color perfectly without a lot of restriction. Okular change background color function with a lot of restriction makes this feature almost useless. This bug already exist for many years. I will not happy If this bug do not fix.
(In reply to widon1104 from comment #9) > Do you try foxit reader ? This software change backgroud color perfectly > without a lot of restriction. No, i try not to use non Free software if i don't have to. This is one of the cases when i don't have to. > Okular change background color function with a lot of restriction makes this > feature almost useless. > > This bug already exist for many years. It's not a bug. > I will not happy If this bug do not fix. I am not responsible for your happiness. Only you are.
Try to learn from non Free software will make free software better.
Albert, I think I understand that it's the PDF file authior's fault for adding an opaque white square on top of the background, but it would be nice of Okular could detect this type of thing and handle is so that the background changing effect works more reliably. To the user, the background is the background. Whether there's an unnecessary white square on top of it is irrelevant; from the user's perspective, the color changing feature does not work with this PDF. I think it's a fairly reasonable request since the user shouldn't have to understand the structure of the PDF file itself, nor should the feature only work with perfectly-structured PDFs. Changing the title to reflect the technical change needed to implement this feature request.
I agree with Nate Graham. No body fix this bug until now?
*** Bug 418255 has been marked as a duplicate of this bug. ***