An Asset Stack is a container holding multiple Assets. An Asset Stack allows inclusion of an entire group of Assets to a Question, Section, or Exam Form.
To upload an Asset Stack, you must select Yes for the Allow Asset Stacks setting on the Assets Tab of the Project's Configuration page.
The Upload Stack button on the Upload Assets pop-up is now available displayed below:
The selection and uploading of multiple Assets happens the same as with standard Assets.
The Asset Stack is listed on the Upload Files page displayed below. The first image becomes the thumbnail and a small Asset Stack icon appears on its lower right corner to indicate that it is an Asset Stack, rather than a standard Asset. Balance your mouse over the preview icon and you can scroll through the assets listed in the asset stack using the Next and Previous buttons.