The editor, the command palette, tool windows, and the Markdown preview.
The Bookmarks tool window, listing bookmarks across every fileThe M-x command palette, where you fuzzy-search and run any commandThe Doctor screen, which lists every external tool Editora can use and whether it was foundEditing a Java file, with syntax highlighting, bookmarks in the line-number gutter, the minimap, and the status barThe File Information tool window: encoding, line endings, counts, and character detailsMarkdown preview in Zen mode, with rendered task listsMarkdown split view, with the source on the left and a live GitHub-style preview on the right