Hello Richard,
Thanks for submitting a question about editing images. Once you have the image selected in the editor, click the edit button (with the pencil icon). On the next screen, click “Edit Original”. This will provide you with rotational controls.
These controls are good for a quick fix, but they can, over time, take up space by creating multiple iterations of the same image. It is always best to edit images locally to your exact specifications before uploading them into WordPress.
Best,
Christopher M.