God, this is a travesty this is the worst guide to an area I have ever seen. Obviously, not written by one of the initial developers, but by idiots who don't belong there.
FYI: this problem starts matched on a sloping edge at about 6ft up, a few feet left of the arete. first move is a mini-bump into a very thin/sharp left hand crimp. Then, move to the good pinch on the arete. [This pinch hold flexes significantly. If climbing alone, pad for a sudden backflap if it breaks]. From the pinch do some stuff to gain the good edge at the lip of the arete.
You can do a traverse into this problem starting matched on a rail at about 4ft off the ground, 10ft left of the arete... the moves are awkward and require obnoxious foot work for those with less reach.