☛ - Image block is the actual image.

☛ - The size of the image can be of any size.

☛ - The palette of the image can be of any size.

☛ - Other information includes:

1. Size of the picture in pixels.

2. Position of the image on Logical Screen

3. Local palette for the image.

☛ - The size of the image cannot be modified.

☛ - Changing the image size cases data corruption.