OptionValue
OptionValue[name] extracts option values inside a function defined with OptionsPattern[].
Examples
Define functions with options:
Options[myFunc] = {Color -> Red, Size -> 10}
myFunc[x_, OptionsPattern[]] := {
OptionValue[Color],
OptionValue[Size],
x
}
myFunc[5]
(* {Red, 10, 5} *)
myFunc[5, Color -> Blue]
(* {Blue, 10, 5} *)Please visit the official Wolfram Language Reference for more details.