WordPress 5.8 introduces better block highlighting and an improved selection tool. It shows you a block handle so you can easily move blocks up and down.
Better Select tool with block handles
Block improvements in WordPress 5.8
WordPress 5.8 has many improvements for existing blocks. There are more options for choosing text, background and link colors.
More color options
You can now control the spacing between phone number taiwan columns, cover pages, and other blocks.
Padding option for blocks
Gradient background color option for tables
Changes under the hood
WordPress 5.8 brings many changes for developers to use in their own themes, plugins and projects. Here are some of the under the hood changes for developers.
A new file called theme.json can now be used by theme developers to configure block settings in one place. Theme developers can use it to do things like define colors, add presets, control what options are available for a block, and more. (See details )