The Corner Radius tab allows you to change the radius value of the border for the entire blog.
1. Log into your Blogger dashboard.
2. Go to Theme > Customize > Advanced > Corner Radius.
3. Make necessary changes > Save.
In this section, you can change the border radius throughout the blog.
Drawers and Modals: All drawers and modals.
Popovers: All dropdown menus and submenus.
Content containers: All small cards and containers.
Buttons: All buttons.
Buttons Read More: All buttons Read More.
Icons Circle: All buttons, Icons.
Images: All images.
Images Thumbnails: All small image thumbnails.
Fields: Input fields across forms (e.g., contact).
Pagination: To the blog navigation.