Index: pcb-rnd-svg.1.html
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--- pcb-rnd-svg.1.html	(revision 31942)
+++ pcb-rnd-svg.1.html	(revision 31943)
@@ -67,10 +67,18 @@
 		<TD> sort pcb-rnd generated svgs s1 and s2 and print diff s1 s2; result written to stdout in diff -u format 
 	<TR>
 
+		<TD> diff b1 b2 
+		<TD> run pcb-rnd to generate svgs of b1 and b2 and print their diff; result written to stdout in diff -u format. Boards can be of any format pcb-rnd can load. 
+	<TR>
+
 		<TD> svg-vis-comp s1 s2 
 		<TD> generate a visual comparison of s1 and s2, diffs highlighted: - lines of the diff with blue, + lines with red in a new group, over the faded version of s1. 
 	<TR>
 
+		<TD> vis-comp b1 b2 
+		<TD> generate a svg visual comparison of board files b1 and b2, diffs highlighted: - lines of the diff with blue, + lines with red in a new group, over the faded svg render of b1. Boards can be of any format pcb-rnd can load. 
+	<TR>
+
 		<TD> test brd 
 		<TD> run pcb-rnd on brd and compare the resulting svg to a saved sorted svg reference file called brd.ref 
 	<TR>