Timing marks - intake cam timing (HG job) - clarification needed

Okay, the part I do not understand in the below instruction from Brotherton's directions is where he says " Take the intake gear and turn it clockwise, looking straight at it from the front (don't move the cam).

Turn it clockwise until when/what? He does not tell you when/where to stop turning it. I do not understand this at all. Any clarification would be greatly appreciated. Thanks.

GEAR ASSEMBLY
I've described how to get the sequence of assembling the gear on the intake cam right a number of times over the phone. The easiest way for me to explain it here goes like this: Forget the chain for the moment and place both cams on their doweled marks. Take the intake gear and turn it clockwise, looking straight at it from the front (don't move the cam).

In this position, the cams are on the marks, the crank should have stayed there from first disassembly and, most importantly, the cam, while in its mark, is retarded in the adjuster. If the chain were in pieces, you could just drape it over and pin it and you'd be set. It can't be assembled in this way, since we don't break the chain in the operation.

This example is conceptual to describe the effective positioning of all parts. During actual assembly, you must get the chain on the gear, have it pulled tight on the driver's side and be sure that the cam is retarded to match the concept above.

After becoming acquainted with the cam timing arrangement, remove the exhaust gear. Probably one of the toughest issues can be the removal of the pin from the driver's side guide rail (see Photo 7).