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According to this page navigating between highlighted usages:
(source: jetbrains.com)
can be done using F3 or Ctrl+L and Shift+F3 or Ctrl+Shift+L keyboard shortcuts, to navigate to the next and previous usages respectively.
However these shortcuts are by default used to navigate between search occurences (Ctrl+F), not highlighted usages, and indeed this is how they work. Is there any other way to navigate between highlighted usages using keyboard?