diff -PruN electric-6.04ad/src/include/sim.h electric-6.04ad-tt/src/include/sim.h
--- electric-6.04ad/src/include/sim.h	Sun Jul 15 23:03:48 2001
+++ electric-6.04ad-tt/src/include/sim.h	Tue Jul 17 20:14:04 2001
@@ -132,6 +132,7 @@
 void    sim_window_displaycolor(INTBIG strength, INTBIG color);
 INTBIG  sim_window_newtrace(INTBIG, char*, INTBIG);
 INTSML  sim_window_buscommand(void);
+INTSML  sim_window_reversecommand(void);
 INTSML  sim_window_makebus(INTBIG count, INTBIG *traces);
 void    sim_window_loaddigtrace(INTBIG, INTBIG, float*, INTSML*);
 void    sim_window_loadanatrace(INTBIG, INTBIG, float*, float*);
diff -PruN electric-6.04ad/src/sim/simalsgraph.c electric-6.04ad-tt/src/sim/simalsgraph.c
--- electric-6.04ad/src/sim/simalsgraph.c	Sun Jul 15 23:03:53 2001
+++ electric-6.04ad-tt/src/sim/simalsgraph.c	Tue Jul 17 20:19:26 2001
@@ -147,6 +147,11 @@
 		case 'b':
 			(void)sim_window_buscommand();
 			return(0);
+		
+		/* Reverse signal order */
+		case 'm':
+			(void)sim_window_reversecommand();
+			return(0);
 
 		/* add trace */
 		case 'a':
@@ -623,6 +628,7 @@
 		ttyputinstruction(" A", 4, _("Add signal to simulation window"));
 		ttyputinstruction(" R", 4, _("Remove signal from the window"));
 		ttyputinstruction(" B", 4, _("Combine selected signals into a bus"));
+		ttyputinstruction(" M", 4, _("Reverse the order of the selected signals"));
 		ttyputinstruction("FT", 4, _("Full Trace of all events"));
 		ttyputinstruction(" P", 4, _("Preserve snapshot of simulation window in database"));
 	}
diff -PruN electric-6.04ad/src/sim/simwindow.c electric-6.04ad-tt/src/sim/simwindow.c
--- electric-6.04ad/src/sim/simwindow.c	Sun Jul 15 23:03:53 2001
+++ electric-6.04ad-tt/src/sim/simwindow.c	Thu Jul 19 13:59:54 2001
@@ -61,6 +61,7 @@
  *     CONTROL OF TRACES:
  * INTBIG sim_window_newtrace(line, name, data) Creates trace at "line" called "name" with user "data"
  * INTSML sim_window_buscommand()               Creates a bus from currently selected signals
+ * INTSML sim_window_reversecommand()           Reverses the order of the selected signals
  * sim_window_loaddigtrace(tr, num, time, sta)  Loads trace "tr" with "num" digital signals "time/sta"
  * sim_window_loadanatrace(tr, num, time, val)  Loads trace "tr" with "num" analog signals "time/val"
  * sim_window_setanarange(low, high)            Sets analog display range from "low" to "high"
@@ -214,6 +215,7 @@
 static void        sim_window_hthumbtrackingcallback(INTBIG delta);
 static void        sim_window_mapcoord(WINDOWPART*, INTBIG*, INTBIG*);
 static void        sim_window_moveto(INTBIG, INTBIG);
+static void        sim_window_movetrace(DISCHANNEL *tr, DISCHANNEL *otr, DISCHANNEL *otrprev);
 static char       *sim_window_namesignals(INTBIG count, DISCHANNEL **list);
 static void        sim_window_plottrace(DISCHANNEL *tr, WINDOWPART *wavewin, INTBIG highlight);
 static void        sim_window_redisphandler(WINDOWPART*);
@@ -663,6 +665,65 @@
 	return(0);
 }
 
+/*
+ * Routine to reverse the order of selected signals.  Returns nonzero on error.
+ */
+INTSML sim_window_reversecommand(void)
+{
+	DISCHANNEL *tr, *otr, *otrprev;
+	DISCHANNEL **traces;
+	INTBIG i, count;
+	char *par[2];
+
+	count = sim_window_highlightedtracecount;
+	if (count == 0) return(1);
+	if (count == 1)
+	{
+		ttyputerr(_("Must select multiple signals whose order to reverse"));
+		return(1);
+	}
+	
+	/* Copy list of highlighted traces into a temporary array */
+	traces = (DISCHANNEL **)emalloc(count * sizeof(DISCHANNEL**), sim_tool->cluster);
+	for (i=0; i<count; i++) {
+		traces[i] = sim_window_highlightedtraces[i];
+	}
+	
+	/* erase highlighting */
+	sim_window_cleartracehighlight();
+
+	for (i=count-1; i>=1; i--)
+	{
+		tr = traces[i];
+
+		/* find which signal name it is dragged to */
+		otrprev = NODISCHANNEL;
+		for(otr = sim_window_plot; otr != NODISCHANNEL; otr = otr->nextdischannel)
+		{
+			if ((otr->flags&TRACENOTDRAWN) == 0)
+			{
+				if (otr == traces[0]) break;
+			}
+			if (otr != tr) otrprev = otr;
+		}
+
+		if (otr != NODISCHANNEL) {
+			sim_window_movetrace(tr, otr, otrprev);
+		}
+	}
+	
+	/* Highlight signals again */
+	for (i=0; i<count; i++) {
+		sim_window_addhighlighttrace((INTBIG)(traces[i]));
+		par[0] = "highlight";
+		telltool(net_tool, 1, par);
+	}
+
+	efree((char *)traces);
+
+	return(0);
+}
+
 char *sim_window_namesignals(INTBIG count, DISCHANNEL **list)
 {
 	REGISTER INTBIG i, j, rootlen;
@@ -1799,8 +1860,7 @@
 {
 	INTBIG x, y, xpos, ypos, i, j, ind, temp_trace_spacing, tracelinesmoved;
 	char *par[2];
-	REGISTER DISCHANNEL *tr, *otr, *otrprev, *nexttr, *addloc,
-		*buschain, *endbuschain;
+	REGISTER DISCHANNEL *tr, *otr, *otrprev;
 
 	/* changes to the mouse-wheel are handled by the user interface */
 	if (wheelbutton(button) != 0)
@@ -2017,51 +2077,7 @@
 				}
 				if (otr != NODISCHANNEL)
 				{
-					/* pull out the selected signal */
-					sim_window_removetrace(tr);
-
-					/* insert signal in new location */
-					if (tr->position < otr->position)
-					{
-						sim_window_addtrace(tr, otr);
-					} else
-					{
-						sim_window_addtrace(tr, otrprev);
-					}
-
-					/* move any bus signals inside of this */
-					buschain = endbuschain = NODISCHANNEL;
-					for(otr = sim_window_plot; otr != NODISCHANNEL; otr = nexttr)
-					{
-						nexttr = otr->nextdischannel;
-						if (otr->buschannel == tr)
-						{
-							sim_window_removetrace(otr);
-							if (endbuschain == NODISCHANNEL) endbuschain = buschain = otr; else
-							{
-								endbuschain->nextdischannel = otr;
-								endbuschain = otr;
-							}
-							otr->nextdischannel = NODISCHANNEL;
-						}
-					}
-					addloc = tr;
-					for(otr = buschain; otr != NODISCHANNEL; otr = nexttr)
-					{
-						nexttr = otr->nextdischannel;
-						sim_window_addtrace(otr, addloc);
-						addloc = otr;
-					}
-
-					/* renumber lines in the display */
-					for(i=0, otr = sim_window_plot; otr != NODISCHANNEL; otr = otr->nextdischannel)
-						if ((otr->flags&TRACENOTDRAWN) == 0) otr->position = i++;
-
-					/* redisplay window */
-					sim_window_redraw();
-
-					/* save the new configuration */
-					sim_window_savesignalorder();
+					sim_window_movetrace(tr, otr, otrprev);
 				}
 				sim_window_addhighlighttrace((INTBIG)tr);
 				par[0] = "highlight";
@@ -3263,6 +3291,65 @@
 	tr->nameoff = 0;
 	tr->buschannel = NODISCHANNEL;
 	return(tr);
+}
+
+/*
+ * Move trace tr to the position of otr.
+ * otrprev is the trace before otr in the linked list or NODISCHANNEL if otr is first.
+ * (I think sim_window_cleartracehighlight has to be called before this, not sure -TT)
+ */
+void sim_window_movetrace(DISCHANNEL *tr, DISCHANNEL *otr, DISCHANNEL *otrprev)
+{
+	DISCHANNEL *nexttr, *addloc, *buschain, *endbuschain;
+	INTBIG i;
+	
+	if (tr == otr) return;
+
+	/* pull out the selected signal */
+	sim_window_removetrace(tr);
+
+	/* insert signal in new location */
+	if (tr->position < otr->position)
+	{
+		sim_window_addtrace(tr, otr);
+	} else
+	{
+		sim_window_addtrace(tr, otrprev);
+	}
+
+	/* move any bus signals inside of this */
+	buschain = endbuschain = NODISCHANNEL;
+	for(otr = sim_window_plot; otr != NODISCHANNEL; otr = nexttr)
+	{
+		nexttr = otr->nextdischannel;
+		if (otr->buschannel == tr)
+		{
+			sim_window_removetrace(otr);
+			if (endbuschain == NODISCHANNEL) endbuschain = buschain = otr; else
+			{
+				endbuschain->nextdischannel = otr;
+				endbuschain = otr;
+			}
+			otr->nextdischannel = NODISCHANNEL;
+		}
+	}
+	addloc = tr;
+	for(otr = buschain; otr != NODISCHANNEL; otr = nexttr)
+	{
+		nexttr = otr->nextdischannel;
+		sim_window_addtrace(otr, addloc);
+		addloc = otr;
+	}
+
+	/* renumber lines in the display */
+	for(i=0, otr = sim_window_plot; otr != NODISCHANNEL; otr = otr->nextdischannel)
+		if ((otr->flags&TRACENOTDRAWN) == 0) otr->position = i++;
+
+	/* redisplay window */
+	sim_window_redraw();
+
+	/* save the new configuration */
+	sim_window_savesignalorder();
 }
 
 /********************************* LOW LEVEL GRAPHICS *********************************/