Opportunity is missed by most people because it is dressed in overalls and looks like work. - Thomas Edison
Up and down by 1/4" marks on my board. Sideways by moving the screen on single colors, and shifting the shirt on multi color.You really have to move it. Let's be real and realize that the same position won't look anywhere near the same on a small, as on an XXL, my typical every day range.I may fudge between two close sizes, but not more of a jump than that.