And also...
The functionalities of the last buttons on the main menu are quite short to explain and are therefore gathered here:
Welcome Guide
By clicking on the button you launch the editor's welcome guide.
It is not as complete as the documentation, but it briefly presents the key elements of the interface. It automatically appears on your first visit to the editor, but you can relaunch it at any time with this button.
Light mode / Dark mode
By clicking on the button the editor will switch to dark mode.
This setting is then saved in your account and the next time you go to the editor (regardless of the story) you will find the selected mode.
Exit the editor
By clicking on the button Studio, you will leave the editor and return to your Studio.