Hi Sue,

Another option is to create a folder in your Assets library called something like "Old Images" and move the images into there that you don't think you're using.

The URL of the image won't change even if you move it into a folder.

That way, you can organise your existing assets to get old ones out of the way, without breaking any pages/links that might still be using them.

(Note: if you move Content pages into a different folder of your site the URL does change, but moving Assets into folders doesn't change their URLs)

Cheers

Joe