You can unmount an image both from Images or Devices tabs.

  1. Find the image you want to unmount in catalog and click Unmount button on the toolbar (1) or the relevant option from the contextual menu of an image (2):

    unmount-image

  2. Choose Unmount option from the contextual menu of the needed drive:

    unmount-image

Also, you can unmount an image from the tray agent or from Explorer.