+.PP
+\fB\-\-environment\fR
+.RS 4
+Print the complete environment for all events\. Can be used to compare the kernel supplied and the udev added environment values\.
+.RE
+.PP
+\fB\-\-kernel\fR
+.RS 4
+Print the kernel uevents\.
+.RE
+.PP
+\fB\-\-udev\fR
+.RS 4
+Print the udev event after the rule processing\.
+.RE
+.PP
+\fB\-\-help\fR
+.RS 4
+Print usage\.
+.RE