Clicking on a heading will scroll the document to the position of the
heading.
As the document is scrolled, the heading being read is highlighted and
the list scrolls to keep it in view. If that heading is hidden inside a
collapsed section, the collapsed heading is highlighted instead.
Nested items can be collapsed by pressing the corresponding button.
Highlights
Similar to the table of contents, but instead of headings this feature
will list highlighted text from a text note and allow easy navigation to
them.
Unlike table of contents which supports multiple note types, the highlights
are specific to the Text notes.
Highlighted text is defined as:
Bold text.
Italic text.
Underlined text.
Text with a foreground color set.
Text with a background color/highlight set.
Interaction
Clicking on a highlighted text will scroll the document to its position.
Configuration
Globally, it's possible to toggle the display of each category of highlighted
text (as defined above)
Pressing the gear button in the top-right part of the section will reveal
a menu to toggle between the highlight categories.
Alternatively, they can be changed by going to Text Notes settings
and looking for the Highlights List section.
PDF-specific outline
When PDFs are
opened in Trilium, the Right Sidebar is
augmented with PDF-specific navigation, with the following features:
Table of contents/outline
All the headings and “bookmarks” will be displayed hierarchically.
The heading on the current page is also highlighted (note that it can
be slightly offset depending on how many headings are on the same page).
Clicking on a heading will jump to the corresponding position in the PDF.
Pages
A preview of all the pages with a small thumbnail.
Clicking on a page will automatically navigate to that page.
Right-clicking a page and selecting Copy reference copies a link
that opens the PDF at that page.
Annotations
Highlight and comment annotations are listed here.
Right-clicking an annotation and selecting Copy reference copies
a link that opens the PDF at that annotation.
Attachments
If the PDF has its own attachments (not to be confused with Trilium's Attachments),
they will be displayed in a list.
Some information such as the name and size of the attachment are displayed.
It's possible to download the attachment by clicking on the download button.
Layers
A less common feature, if the PDF has toggle-able layers, these layers
will be displayed in a list here.
It's possible to toggle the visibility for each individual layer.
