A few more details: - the "Terminal" tab, as @elextr said, is not available on Windows - the "Tasks" tab is part of the "Addons" plugin, installable via the Geany-Plugins, available on https://www.geany.org/download/releases/ - the tabs "Markdown preview" and "Web preview" are part of the "Markdown" und "Web Helper" plugins which are not available on Windows, see the release announcement at https://www.geany.org/news/geany-plugins-138-are-out/ for details.