画像を読み込むだけでなく、Pillowを使って画像を編集することもできます。次のコードは、テストファイルから領域を切り取り、180°回転させて貼り戻し、修正した画像をファイルに保存します：

``` python
bounding_box = (
    100,  # left hand side
    100,  # top side
    400,  # right hand side
    400  # bottom side
)

# Crop to the region [100, 400) in both x and y direction:
cropped_region = test_image.crop(bounding_box)

# Rotate the cropped region by 180 degrees:
cropped_region = cropped_region.transpose(Image.Transpose.ROTATE_180)

# Paste the rotated cropped region back into the original image:
test_image.paste(cropped_region, bounding_box)

# Finally, save it to a file:
test_image.save("edited.png")
# The image type can be automatically inferred from the file extension.
```

Pillowについてもっと知りたいことや、具体的な使用例はありますか？
In addition to loading image you can also use Pillow to for example edit images. The following code will crop a region from the test file, rotate it by 180°, paste it back, and then save the modified image to a file:

``` python
bounding_box = (
    100,  # left hand side
    100,  # top side
    400,  # right hand side
    400  # bottom side
)

# Crop to the region [100, 400) in both x and y direction:
cropped_region = test_image.crop(bounding_box)

# Rotate the cropped region by 180 degrees:
cropped_region = cropped_region.transpose(Image.Transpose.ROTATE_180)

# Paste the rotated cropped region back into the original image:
test_image.paste(cropped_region, bounding_box)

# Finally, save it to a file:
test_image.save("edited.png")
# The image type can be automatically inferred from the file extension.
```

Is there an aspect of Pillow in particular that you would like to learn more about or do you have a specific use case?