Themes and appearance
Choose a design when creating an app, then use Theme above Preview to adjust its appearance.
Choose a design before generation
Open the design picker alongside your app-creation prompt.
Choose a style from the available design cards, or use Default.
Describe the app, review the assistant's plan, and confirm generation.
Check the generated pages and controls in Preview.

Your selected design is saved with the app and guides later assistant requests, helping new pages and edits follow the same style. The default Jet design also guides generated controls such as date pickers, sliders, and select menus.

If an edit does not match the chosen design, identify the affected page or component and ask for a focused styling correction.
Adjust the theme of an existing app
Apply a theme template for a coordinated starting point.
Customize theme settings for individual typography, color, border, and spacing choices.
Theme presets style the app. They are different from app templates that provide a starting app structure.
After changing the theme, check a list, a form, and a dialog in both light and dark modes where used. Also inspect Desktop, Tablet, and Mobile previews.
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