We've streamlined the page themes UI to allow you to

• Browse themes that are available or toggle page styles intuitively with a block-based UI

• Preview themes visually to understand how they'll appear before applying them

• Detach themes to make slight one-off tweaks without affecting existing themes

• Rename themes to fix typos or update theme names without having to recreate them

• Delete unused themes to clean up your workspace

This gives you more control when managing page themes and makes designing your pages more flexible.