The image box has Box mode and Img mode, which can be switched with the switch at the top right of the box.
In Box mode, the image is treated as the background fill.
The size information of the image itself is not recognized, so it is not possible to maintain the aspect ratio, but you can apply filter effects such as brightness and contrast, or insert another element as a child element from the "Image" tab.
In Img mode, the image is treated as an element with mass. You can set it to recognize the ratio of the image and hold it at "auto", but you can't apply an effect to the image or put child elements on it.
Also, in Img mode, you can use the "alt setting" button on the top left to display the text when the image is not displayed for some reason.