The right sidebar displays specific content for the current note. Currently it includes:
Note that the sidebar is not displayed if it would otherwise be empty, for example if there are too few headings and there are no highlights.
The sidebar can be hidden or shown by using the toggleRightPane keyboard
shortcut, which is not assigned by default.
When using Split View, there is a single sidebar serving all the open splits for the current tab.
Clicking on a note within the split view will display the sidebar for that note. If there are no items to display in the sidebar, it will remain closed.