Hi! The image will be visually resized to fit into the annotation card. You can adjust the maximum width of the annotation card via the cardMaxWidth theme setting (e.g. in "custom_theme" in your prodigy.json or recipe config). See here for details: https://prodi.gy/docs/api-web-app#theme-sizes
By default, the maximum width is 675 (pixels). You can also set its value to something like "95%", which will be interpreted relative to the parent container (the right column).