There’s usually a gear icon that appears when clicking an image. Here’s an example from one of my sites
. Are you in the designer when doing this? The ‘assets’ panel only has the option to delete the image.
You need to click the image where it’s used on the site in the designer.
Let us know if that did/didn’t help!
PS. for future help, it’s always easier for us to give accurate suggestions when you add the project’s ‘read-only’ link. Instructions on how to do that here: How to Enable a Webflow Share Link