How to Hide Tracked Change Footnotes
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This topic is relevant if you have set the show.changes.and.comments.as.pdf.sticky.notes transformation parameter to no, and therefore the changes are shown as footnotes instead of PDF annotations.

In some cases, when your document contains a lot of tracked changes, you may need to hide the footnotes associated with the insertions, deletions, or attribute changes. Using the following example, the deletions and insertions are hidden, but the comments remain visible. In your customization CSS, add:
oxy-attributes,
oxy-delete,
oxy-insert{
  float:none;
  display:none;
}