OptionalsizeFractional on-screen size difference tolerated in each direction; 0.1 accepts a target rendered up to 10% larger or smaller than the template. Defaults to 0 (exact size). Tolerance searches cost more time; prefer a region when polling with tolerances.
OptionalrotationRotation tolerated in each direction, in degrees. Defaults to 0 (unrotated). Small tilts such as an animating button are the intended range; beyond 15 degrees the search would need a rotation-invariant method and the value is rejected.
OptionalmatchWhen true (default), the winning position must also match in color and absolute brightness: mild brightness/contrast grading still passes, while a same-shape element in a different hue or a much darker/brighter lookalike is rejected. Set false to compare purely on grayscale structure, e.g. when the target recolors with game state.
Optional search tuning for Screen.FindImage / Screen.FindImageBase64. Every field is optional; the defaults are the fast exact-pose, color-verified search. Unknown fields are rejected.