The Images page lists all available images:
From there you can navigate to the Image Details page:
From the Actions dropdown menu you can:
Change the Image availability
Delete, Enable or Disable the Image
In the Stack which have this Image section you can see on which stacks the image is available:
In order to change the availability, you should select Image availability from the Actions dropdown menu:
In the last section all virtual machines are listed that use this image:
One can add an Image by pressing the + Add Image button.
CD-ROM Images can be used to temporarily boot a VM from a CD-ROM image. This can be used for either manually reinstalling a VM (not recommended better to use a template) or to recover a VM which is in trouble.
One can add a CD-ROM Image by pressing the + Add CD-ROM Image button. CD-ROM images are always available for all CPU nodes