The Design Studio is your visual workspace for carousels and Reel covers.
To make everything look on-brand:
Upload your branding assets, like your logo and brand colours.
Pick your fonts, or choose from the Studio's font selection.
Bring in copy you've created in the other Studios and lay it out slide by slide.
Good to know: manual visual edits in the Design Studio use no AI usage, so you can tweak layouts, fonts and colours as much as you like.