Globally Update Block Styles
TLDR; It's automatically updated globally. So you don't have to manually update them one by one.
Globally updating blocks without affecting existing contents
After changing the colour or font size of the text, you might wonder if you have to update them on every page where the block is used. The short answer is NO.
Here is the default behaviour.
When you change the styles, it's applied globally without affecting the content.
If you add a new DOM element, it will be added with its default value.
When you delete a DOM element it will be removed globally along with its contents.
Video Tutorial
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