Introduction of presets across padding, margin and block gap – Make WordPress Core

The introduction of pre-set sizes to be shared across padding, margin and block gap in WordPress 6.1.

WordPress Spacing Explained - Padding/Margin/Border Usage In Elements

Using Presets – Theme Handbook

WordPress6.1】theme.json の変更点 #WordPress - Qiita

Style Variations in Theme Directory (Beta), first Devnotes for WordPress 6.1, eCommerce blocks by EDD and Woo - Weekend Edition #232 - Gutenberg Times

Theme.json layout and spacing options - Full Site Editing

Theme.json layout and spacing options - Full Site Editing

Using The New Constrained Layout In WordPress Block Themes

Everything you need to know about spacing in block themes – WordPress Developer Blog

Block Margins, Paddings & Block Gap (using theme.json)

WordPress】 受託開発におけるハイブリッドテーマ開発 #WordPress - Qiita