I've actually never encountered that issue, but because Zim is a wiki style editor, you could create links to different pages for asides. It's still another pag

I've actually never encountered that issue, but because Zim is a wiki style editor, you could create links to different pages for asides. It's still another page, but at least it can be all grouped together. I have found Zim to be a great tool for note taking and creating a personal knowledge base. I can create a link to a more detailed explanation from any page if needed, or write down examples separate from theory.