The window

Everything is in one window, with a toolbar on top and three panels you can show or hide.

• Tabs in the title bar, one per open file. Switch with Ctrl+Tab and Ctrl+Shift+Tab, close with Ctrl+W. Tabs can be dragged between MatLivre windows.
• Toolbar. New, Open, Save and Insert menus; Run section, Run and advance, Run all and Stop; buttons for the Claude panel and the command window; and the … menu (clear all output, dark theme, code completions, connect Claude Code, getting started).
• Files panel. Open a folder as the project root and browse it like in VS Code. Click a file to open it.
• Workspace panel. Lists your variables with name, value and size after you run code. It has a button to clear the workspace.
• Command window. Type a command after >> and press Enter. The up and down arrows recall earlier commands. Toggle it with Ctrl+`.
• Themes. Light and dark, from the … menu. Your layout and theme are remembered between sessions.