diff --git a/VERSION b/VERSION
index 3c3218d6..b4df5cd0 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-8.3.429
+8.3.430
diff --git a/commands/CmdE.c b/commands/CmdE.c
index b1166135..28f10edc 100644
--- a/commands/CmdE.c
+++ b/commands/CmdE.c
@@ -911,9 +911,10 @@ cmdExpandFunc(use, windowMask)
 #define	EXTPARENTS	7
 #define EXTPATH		8
 #define	EXTSHOWPARENTS	9
-#define	EXTSTYLE	10
-#define	EXTUNIQUE	11
-#define	EXTWARN		12
+#define EXTSTEPSIZE	10
+#define	EXTSTYLE	11
+#define	EXTUNIQUE	12
+#define	EXTWARN		13
 
 #define	WARNALL		0
 #define WARNDUP		1
@@ -1007,6 +1008,7 @@ CmdExtract(w, cmd)
 	"parents		extract selected cell and all its parents",
 	"path [path]		if set, extract into the indicated path",
 	"showparents		show all parents of selected cell",
+	"stepsize [value]	print or set the extraction step size",
 	"style [stylename]	set current extraction parameter style",
 	"unique [option]	generate unique names when different nodes\n\
 			have the same name",
@@ -1139,6 +1141,36 @@ CmdExtract(w, cmd)
 		ExtCurStyle->exts_sideCoupleHalo = dist;
 	    break;
 
+	case EXTSTEPSIZE:
+	    if (ExtCurStyle == NULL)
+	    {
+		TxError("No extraction style set.\n");
+		return;
+	    }
+	    else if (argc == 2)
+	    {
+#ifdef MAGIC_WRAPPER
+		Tcl_Obj *tobj;
+		tobj = Tcl_NewIntObj(ExtCurStyle->exts_stepSize);
+		Tcl_SetObjResult(magicinterp, tobj);
+#else
+		TxPrintf("Extraction step size is %d\n", ExtCurStyle->exts_stepSize);
+#endif
+		return;
+	    }
+	    else if (argc != 3) goto wrongNumArgs;
+
+	    /* argv[2] is a step size */
+	    dist = cmdParseCoord(w, argv[2], TRUE, TRUE);
+	    if (dist <= 0)
+	    {
+		TxError("Bad step size.  Step size must be strictly positive.");
+		return;
+	    }
+	    else
+		ExtCurStyle->exts_stepSize = dist;
+	    break;
+
 	case EXTPARENTS:
 	    selectedUse = CmdGetSelectedCell((Transform *) NULL);
 	    if (selectedUse == NULL)
diff --git a/doc/html/extract.html b/doc/html/extract.html
index 2f1e5a6d..00a9144c 100644
--- a/doc/html/extract.html
+++ b/doc/html/extract.html
@@ -125,7 +125,16 @@ Circuit netlist extractor
 		  <DD>
 		</DL>
 	      </BLOCKQUOTE>
-	
+	   <DT> <B>halo</B> [<I>distance</I>]
+	   <DD> Return or set the maximum distance between shapes for which
+		sidewall coupling is considered.  <I>distance</I> is in
+		the units of snap distance (lambda, by default), but like
+		all distances may be specified with a suffix like "um" for
+		physical distance.  The default value is set by the technology
+		file.  Smaller values will decrease the parasitic capacitance
+		extraction time at the expense of accuracy.  When <I>distance</I>
+		is not specified, the value returned is always in internal
+		units.
 	   <DT> <B>help</B>
 	   <DD> Print help information
 	   <DT> <B>path</B> [<I>pathname</I>|<B>none</B>]
@@ -150,6 +159,17 @@ Circuit netlist extractor
 	   <DD> List the cell and all parents of selected cell.  Note that
 		this is not really an extract option and is superceded by
 		the <B>cellname</B> command.
+	   <DT> <B>stepsize</B> [<I>distance</I>]
+	   <DD> Return or set the step size used when breaking a layout into
+		smaller parts for more efficient extraction.  <I>distance</I>
+		is in the units of snap distance (lambda, by default), but like
+		all distances may be specified with a suffix like "um" for
+		physical distance.  The default value is set by the technology
+		file.  Both large and small values make extraction inefficient,
+		and finding the optimal step size is largely trial-and-error.
+		The step size in a tech file has most likely already been
+		optimized for extraction speed.  When <I>distance</I> is not
+		specified, the value returned is always in internal units.
 	   <DT> [<B>list</B>|<B>listall</B>] <B>style</B> [<I>stylename</I>]
 	   <DD> Set the current extraction style to <I>stylename</I>.
 		Without arguments, print the current extraction style.