The width of the images in this image list.
The height of the images in this image list.
A list of images or image sets.
This specifies the filename of a file suitable for loading with load-image.
The symbol must be a predefined image identifier, or have been registered by means of a call to register-image-translation.
An image object, as returned by load-image.
See image-set for further details.
The images added to the image list are numbered in order, starting from zero. An image-set containing n images contributes n images to the image list, and hence consumes n consecutive integer indices.