It's fascinating to watch the marks get closer to the center as we near the proper length. Our equipment editor, Rob Sauerhaft, with just a sampling of the clubs he was fitted for. The answers influence the clubs I try next. We continue by trial and error until he thinks he has found it. At that point, most fitters discuss the merits of steel versus graphite, and which makes more sense for me.
Most companies have five grip sizes to try, each on a cut-off shaft.
Then it's more notes on the worksheet, followed by discussion of his recommendations. If you don't understand why the fitter made a recommendation, ask for an explanation. And keep asking until you are comfortable with the final fit. Don't attempt to outsmart the system by looking at the sole tape or face decals and adjusting your swing. Make your normal swing if you hope to be fit properly.