Edit file File name : block.json Content :{ "$schema": "https://schemas.wp.org/trunk/block.json", "apiVersion": 3, "name": "core/read-more", "title": "Read More", "category": "theme", "description": "Displays the link of a post, page, or any other content-type.", "textdomain": "default", "attributes": { "content": { "type": "string" }, "linkTarget": { "type": "string", "default": "_self" } }, "usesContext": [ "postId" ], "supports": { "html": false, "color": { "gradients": true, "text": true }, "typography": { "fontSize": true, "lineHeight": true, "__experimentalFontFamily": true, "__experimentalFontWeight": true, "__experimentalFontStyle": true, "__experimentalTextTransform": true, "__experimentalLetterSpacing": true, "__experimentalTextDecoration": true, "__experimentalDefaultControls": { "fontSize": true, "textDecoration": true } }, "spacing": { "margin": [ "top", "bottom" ], "padding": true, "__experimentalDefaultControls": { "padding": true } }, "__experimentalBorder": { "color": true, "radius": true, "width": true, "__experimentalDefaultControls": { "width": true } }, "interactivity": { "clientNavigation": true } }, "style": "wp-block-read-more" } Save