--- a/man/vbview2.1
+++ b/man/vbview2.1
@@ -13,6 +13,22 @@
 projections or surface renderings.  It allows an arbitrary number of
 layers and graphs time series data.
 .SH OPTIONS
+.TP
+\fB\-m\fR <vol>
+load a mask image
+.TP
+\fB\-a\fR <vol>
+load an auxiliary volume
+.TP
+\fB\-s\fR <vol>
+load a statistical map
+.TP
+\fB\-h\fR
+show help
+.TP
+\fB\-v\fR
+show version
+.P
 To get a complete list of available flags, run the program with the -h
 argument.
 .SH AVAILABILITY
