The app in a tab

Click the TypeFire icon in the toolbar (pin it from the puzzle-piece menu if it is hidden) and the app opens in its own tab, as a window on a soft canvas. The button at the top right of that window switches to Fill the tab, which uses the whole tab; the choice is kept, and a tab narrower than about 1000 pixels always fills. The three worlds are the tabs at the top left, and 1, 2 and 3 switch between them from anywhere in the app. Settings, the graph, the theme and the help menu sit at the foot of the sidebar.

The first time you open each world a short tour walks it; End tour stops it for good. Any note can also open in its own tab (right-click it, Open in editor): a full-height editor with the same toolbar, which follows the app's theme and text size, and what you type in either place shows in the other.