Which spray gun control regulates the shape of the spray pattern?

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Pattern shape is controlled by the fan width control. This dial adjusts how much air flows across the nozzle, which spreads or tightens the paint into a fan. Turning it up widens the spray pattern for broader coverage, while dialing it down narrows it for precision at edges or small areas. The other controls play different roles: the fluid tip mainly changes how much liquid is delivered and how fine the atomization is, and trigger sensitivity affects how the gun responds when you pull the trigger. Air cap selection influences overall spray characteristics, but the specific shape of the spray pattern is governed by the fan control.