[made]

If anyone is interested I did file a support case and this is the answer:

Regarding the Snapshots, the product team believe the marketing department issued this with a typo, and should have actually been referring to recalling layouts, info as below:

Storing and Recalling Custom Layouts
Layouts let you assign specific tracks to specific channel strips on the S3, and have those channel strips ignore banking and nudging (ensuring that the specific tracks remain available for as long as the Layout is active). You can store Layouts using the Assign and Layouts tabs of the EuControl Settings application. Once stored, you can then recall Layouts using the Bank switches A–F. Bank switches A–F correspond to Layouts 1–6 respectively. Shift + A–F correspond to Layouts 7–12 respectively. Layouts are saved with your Pro Tools session.