Paying symbols will randomly appear expanded over 2, 3 or 4 positions on any reel. If these expanded symbols form part of a winning combination, they'll turn into a random number of smaller symbols as follows:
1x2 expanded symbol splits into 3 or 4 smaller symbols
1x3 expanded symbol splits into 4, 5 or 6 smaller symbols
1x4 expanded symbol splits into 5, 6, 7 or 8 smaller symbols.