How to change parameter in Amibroker Supertrend AFL?

I need to change the parameters in AFL code for Amibroker, but don’t no AFL. Can anyone suggest exactly which part contains the numbers/parameters so that I can replace with my own.

Thanks

In Amibroker to change the parameters of the AFL, right click on the Chart plotted and select parameter and can choose the options and can change the value, you can also change by opening the AFL from the formula editor.