Problem deleting Highlights in Preview on Golden Gate.

For unflattened PDFs, where annotations are still accessible, the usual means of removing Highlights in Preview is to right-click on the individual Highlight and choose Remove Highlight. For larger quantities of Hilights, one uses the Inspector (cmd+i) panel. For instance:

Click the Inspector's first Highlight entry, then use the cmd-key to select additional Highlights, and press backspace to remove all selected Highlights. Then, click once anywhere in the PDF to watch those highlights vanish.

The previous Inspector process can be used to remove other forms of PDF annotations.

Tested: macOS 27.0

Thanks for the reply, VikingOSX. I tried right clicking on the annotation in the PDF and that allowed me to remove it. I've previously done this in the Sidebar, but that no longer works with 'Highlights and Notes.' It still works with Bookmarks, though.

There is no Highlights and Notes item in Preview on macOS 27. These are separate annotation entities on the Markdown toolbar. I just addedd a Note to a PDF; and then selected and removed it from the Inspector's Annotation sidebar via a process that I described in my previous post.

Bookmarks are separate from PDF annotations, and are readily removable from the same location as thumbnails when selecting to view Bookmarks from the Preview Toolbar.

When a PDF is flattened, bookmarks and annotations are no longer available.