Which methods are used for "support" in a "ksdensity" function(kernel smotthing function estimate)

I use the "ksdensity" function for kernel density estimation.

I have a quention for "support (Name-Value Pair Arguments)" in the ksdensity function.

Which method is used for "support - support for the density." (e.g. reflectin the method, transformation method and local linear method, etc.)

Thank you.