You see the platform for creating the bot and the start screen. Add new screens via the button + in the lower right corner. On the right you see an editing block with worksheet: screens, palette, components, reviewing.
Palette. This is a list of ready-made components: text, buttons, images and other. Just move the essential component on the screen of your field.
Components. Here you edit components that were added to the screens. For example, change the text of the bot or choose to what screen leads the selected button.
Screens. You can rename added screens, hide or delete.
Don't forget to save the bot. Otherwise you can lose your work.