If you add a mention manually somewhere, and set the type to Highlight, the image URL will be required even if you change the type to something else. This is not indicated in the form, but the save button will be inactive until you change the type back to Highlight, add an image URL and change the type back again to the intended type.
If you add a mention manually somewhere, and set the type to Highlight, the image URL will be required even if you change the type to something else. This is not indicated in the form, but the save button will be inactive until you change the type back to Highlight, add an image URL and change the type back again to the intended type.