For advanced users and those creating standalone patchers, Snapshots can be accessed via the Snapshots API. These can be used in Javascript with the js object.
Take a snapshot at the current index.
Restore a snapshot at the given index.
Append (no arguments) or add a snapshot at the given index.
Delete a snapshot at the given index.
Get the total number of snapshots.
Get the name of the snapshot at the given index.
Set the name of the snapshot at the given index.
Query the 'embed' state of a snapshot. Returns 1 if the snapshot at the index is embedded, 0 if not.
Set the embed state of the snapshot at the index.
Change a snapshot's index.