The DensityPlot command plots the density of the specified random variable. By default, the range is taken between the 1st and the 99th percentiles of the underlying distribution.

The first parameter can be a distribution (see Statistics[Distribution]), a random variable, or an algebraic expression involving random variables (see Statistics[RandomVariable]).

The options argument can contain one or more of the options shown below. All unrecognized options will be passed to the plots[display] command. See plot[options] for details.

range=deduce or range

By default this is deduce.  This option is used to bound the horizontal real range on which the density is plotted.