You can set how elements appear on the screen.
The image fills the specified container (red border) to fit its size. (Depending on the original size of the image, some areas may be cut off; you can adjust the visible area by double-clicking the image and selecting Mask(Crop) Settings or pressing the Crop button in the Properties Window.)
The original size of the image is adjusted to fit the specified container (red outline).
Ignore the existing settings and change the container (red outline) size to the original size of the image.