I have received annotations on a PDF document from a colleague. He says he inserted them using Adobe Reader. The annotations consist of: (a) notes in yellow boxes (b) strikeout in red (c) strikeout in blue plus a blue caret (triangle) with the suggested alternate text.
My problem is I cannot see the blue carets or suggested alternate text, either in Adobe Reader or Mac Preview. When I print with annotations from Mac Preview, the blue carets show up, but not the alternate text.
I am using an up-to-date version (Acrobat Adobe Reader DC Version 2019.012.20040, Mac OS), so I assume my problem is in my preferences. So... how do I ensure the blue carets (and all other feedback/notes) are displayed, in Adobe Reader? (or in Mac Preview, if that is easier)
Perhaps the NoView bit of the Annotation dictionary entry /Flags is set, it's described in the PDF ISO 32000-1:2008 standard as:
If set, do not display the annotation on the screen or allow it to interact with the user. The annotation may be printed (depending on the setting of the Print flag) but should be considered hidden for purposes of on-screen display and user interaction.