Questions about pdf++

Hi I’m just new to obsidian and want to take notes no a specific pdf documents. I have the following questions:

  1. with pdf++ I can copy the relative link to outside notes, but I can also directly add highlight to the file. Some times I would like to navigate all the highlights I added to the file, but I cannot find where it is.
  2. combining with canvas I can create my mind map of the document, however the link copied into canvas will not be highlighted.

Thanks to anyone answering these questions!