A tile source collections is really just another way of viewing a sequence of tile sources, though instead of viewing one at a time the user is able to view many tile sources at the same time. At this point in time it supports a matrix layout of N by M rows.
The relevant configuration options are shown below. Note the value for the options are the id of the element on the page to bind the button's action to.
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This example demonstrates the configuration options which enable a vertical scrolling image reference strip.
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