Annotations from different pdf editor not properly rendered

[pk72]

I have a lot of documents with annotations made with a different pdf editor. xchange viewer pro v2.0 51 does not properly render these annotations (they are not filled, see attached document). I don't want to get in any "our software is doing right, the annotations are wrong" discussion here. Adobe reader and a couple of other viewers show the annotations filled. Anything you can do for me?
Thanks
Philipp

[Bhikkhu Pesala]

Duplicate post removed.

[Bhikkhu Pesala]

Open the Properties toolbar and select the highlighting.

You will see that the blend mode is "Multiply". Change it to Normal and the solid yellow fill shows up, but since it is 100% it completely obscures the text. Change the blend mode back to "Multiply" again and the highlight shows as expected.

I leave it to Tracker support to tell you who is following the PDF specification correctly.

[pk72]

Thank you venerable bhikkhu Pesala. I found changing to normal blending and then back to multiply works fine.

[Ivan - Tracker Software]

Problem isn't in blend mode or anywhere else except dummy Adobe's logic.

Highlight annotation into mentioned PDF file already contains appearance which you can see into the viewer.

Following this clear rule in PDF specification:

1. Section "12.5.2 Annotation Dictionary"

AP -- (Optional; PDF 1.2) An appearance dictionary specifying how the annotation shall be presented visually on the page (see 12.5.5, “Appearance Streams”). Individual annotation handlers may ignore this entry and provide their own appearances.

This allows each viewer to decide use or not already existing appearance.

2. On other hand, in section "12.5.6.10 Text Markup Annotations" (highlight annotation has a type text markup) there is note:

The annotation dictionary’s AP entry, if present, shall take precedence over QuadPoints;

So, if AP exists, it should be used for such types of annotations.

Following these rules, PDF-XChange viewer renders highlight annotation in user's file using AP because it is specified and valid. Don't ask me why Adobe doesn't follow their own specifications.