Right Click on the Content Control to Copy it.
Click here to enter text even if you have removed the text when you create the content control.To set a content control we need a range of words to insert it on. It does work if the content control is located in an otherwise empty paragraph, but it doesn't if you insert the control in the middle of a paragraph.
GitHub - ckeditor/ckeditor5: Powerful rich text editor framework with a modular architecture, modern integrations, and features like collaborative editing.
Rich text content control word mac Big Buck Bunny from Jason Chen on Vimeo.