IV. This is located by the jog

Perhaps the best manner of locating the cut when the riffle is used, is to jog the top card by pushing it slightly over the right-hand end, with the left first finger. Then make the extra cut with the right hand, throwing the under portion on top, and squaring up at sides and left-hand end only. The deck is passed to the ally by the sides with the right hand, which conceals the jogged card. The ally cuts by the ends, his thumb easily locating the jog, and seizing the packet above it.

The particular manner in which the dealer forms the crimp, or jog, to locate the cut, matters little if it is done in a natural manner and without attracting attention. But a single irregular movement, or a moment's hesitation, may ruin the play. Hence, however simple and easy the particular action may be, the execution should be carefully planned and practiced beforehand, and when put into effect should be performed almost mechanically. For these reasons we have devoted much space to many details that may at first appear of little moment.