--- grohtml_cur.man	2010-10-30 23:15:36.000000000 +0400
+++ grohtml_a.man	2010-10-30 23:29:22.000000000 +0400
@@ -99,6 +99,23 @@
 .B \-P
 option.
 .
+.PP
+.B grohtml
+invokes
+.B groff
+twice. In the first pass pictures, equations and tables are rendered
+using the
+.B ps
+device, and in the second pass HTML output is generated by the
+.B html
+device.
+.PP
+.B grohtml
+always writes output in the \%UTF-8 encoding and has \%built-in
+entities for all non-composite unicode characters. However, groff may
+issue warnings about unknown special characters because they were not
+found during the first pass, when their absence is harmless unless
+they appear inside a table or equation.
 .
 .SH OPTIONS
 .TP