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https://issues.apache.org/jira/browse/PDFBOX-5407?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17516899#comment-17516899
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Maruan Sahyoun commented on PDFBOX-5407:
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This is intented. Setting {{needAppearances(false)}} will skip generating the
visual content of the field (the appearance). So when opening the form the
field will appear empty. What happens in this case is dependent on the viewer.
Note that from PDF 2.0 on it's mandatory to generate an appearance.
Why can't you use {{needAppearances(true)}}?
> Fields visible on click if NeedAppearances = false
> --------------------------------------------------
>
> Key: PDFBOX-5407
> URL: https://issues.apache.org/jira/browse/PDFBOX-5407
> Project: PDFBox
> Issue Type: Bug
> Components: AcroForm, Rendering
> Affects Versions: 2.0.24
> Reporter: Dmitry Betanov
> Priority: Major
> Attachments: Main.java, input.pdf, invisible_fields.mov, output.pdf
>
>
> We have an issue that if we use NeedAppearances = false some of the input
> field values only visible on click.
> This happens only on few viewers like in safari and MacOS default pdf viewer.
> The problem is that we cannot use NeedAppearances = true and similar issues
> suggests to use it.
> Pdfbox version - 2.0.24, JDK - 11.
> Video shows an example of invisible values in MacOS default pdf viewer and
> visible values in chrome.
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