It is a gentle blend of proper product mixture, proper gun settings and
application. Moving the paint gun faster or slower, closer or farther
away from the surface, and with less or more overlap, all combines with
the gun settings to give the final result.
Adjusting the fluid control is done by setting the positive stop on
the trigger. This adjustment is always in line with the gun needle.
The fan adjustment sets the width of the pattern. Too wide a
pattern can cause dry spray; too narrow will result in runs. The fan
adjustment is commonly on the side as in the picture. Some guns
will have the adjustment on the rear.
The screwdriver in this picture points to the fan control
adjustment. Notice that it is not a common side-mount adjustment.