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+.Dd September 8, 2018
+.Dt BROT 1
+.Os
+.
+.Sh NAME
+.Nm brot
+.Nd Mandelbrot renderer
+.
+.Sh SYNOPSIS
+.Nm
+.Op Fl i Ar depth
+.Op Fl s Ar samples
+.Op Fl t Ar a+bi
+.Op Fl f Ar a+bi
+.
+.Sh DESCRIPTION
+.Nm
+renders the Mandelbrot set
+in grayscale.
+.
+.Pp
+The arguments are as follows:
+.Bl -tag -width Ds
+.It Fl f Ar a+bi
+Set complex transform factor.
+.
+.It Fl i Ar depth
+Set number of iterations.
+.
+.It Fl s Ar samples
+Set number of samples per pixel.
+.
+.It Fl t Ar a+bi
+Set complex translation term.
+.El
+.
+.Pp
+The interactive keys are as follows:
+.Bl -tag -width Ds
+.It Ic q
+Quit.
+.
+.It Ic ,.
+Adjust depth.
+.
+.It Ic []
+Adjust samples.
+.
+.It Ic hl
+Adjust real component of translation.
+.
+.It Ic kj
+Adjust imaginary componenent of translation.
+.
+.It Ic ui
+Adjust rotation.
+.
+.It Ic -+
+Adjust scale.
+.
+.It Ic 0
+Reset translation and transform.
+.El