enum Timing
{
item Linear;
item Power_In;
item Power_Out;
item Power_InOut;
item Exp_In;
item Exp_Out;
item Exp_InOut;
item Sine_In;
item Sine_Out;
item Sine_InOut;
item Circle_In;
item Circle_Out;
item Circle_InOut;
item Back_In;
item Back_Out;
item Back_InOut;
item Elastic_In;
item Elastic_Out;
item Elastic_InOut;
item Bounce_In;
item Bounce_Out;
item Bounce_InOut;
item EaseIn_FastOut;
item FastIn_EaseOut;
item EaseIn_EaseOut;
item FastIn_FastOut;
item Custom;
}

The definition Effects::Timing determines the available timing functions for animation effects. Except the 'Custom' item, all items of this definition represent build-in timing functions. These can be simply selected in the effect property Timing.