diff -ur screen-4.0.2/comm.c my.screen-4.0.2/comm.c
--- screen-4.0.2/comm.c	2003-09-08 10:25:08.000000000 -0400
+++ my.screen-4.0.2/comm.c	2007-02-20 16:17:45.000000000 -0500
@@ -202,6 +202,7 @@
 #endif
   { "kill",		NEED_FORE|ARGS_0 },
   { "lastmsg",		NEED_DISPLAY|ARGS_0 },
+  { "lastwin",       ARGS_0 },
   { "license",		NEED_LAYER|ARGS_0 },
 #ifdef LOCK
   { "lockscreen",	NEED_DISPLAY|ARGS_0 },
@@ -299,6 +300,7 @@
   { "terminfo",		ARGS_23 },
   { "time",		ARGS_01 },
   { "title",		NEED_FORE|ARGS_01 },
+  { "toggle",       ARGS_0 },
   { "umask",		ARGS_1|ARGS_ORMORE },
   { "unsetenv",		ARGS_1 },
 #ifdef UTF8
Only in my.screen-4.0.2: comm.h
diff -ur screen-4.0.2/comm.h.dist my.screen-4.0.2/comm.h.dist
--- screen-4.0.2/comm.h.dist	2003-12-05 08:50:19.000000000 -0500
+++ my.screen-4.0.2/comm.h.dist	2007-02-20 14:34:50.000000000 -0500
@@ -223,5 +223,7 @@
 #define RC_XON 172
 #define RC_ZMODEM 173
 #define RC_ZOMBIE 174
+#define RC_TOGGLE 175
+#define RC_LASTWIN 176
 
-#define RC_LAST 174
+#define RC_LAST 176
Only in my.screen-4.0.2: comm.o
Only in my.screen-4.0.2: config.h
Only in my.screen-4.0.2: config.log
Only in my.screen-4.0.2: config.status
Only in my.screen-4.0.2: display.o
Only in my.screen-4.0.2/doc: Makefile
Only in my.screen-4.0.2: encoding.o
diff -ur screen-4.0.2/extern.h my.screen-4.0.2/extern.h
--- screen-4.0.2/extern.h	2003-08-22 08:27:57.000000000 -0400
+++ my.screen-4.0.2/extern.h	2007-02-20 15:57:43.000000000 -0500
@@ -193,6 +193,7 @@
 extern int   Parse __P((char *, int, char **, int *));
 extern void  SetEscape __P((struct acluser *, int, int));
 extern void  DoScreen __P((char *, char **));
+extern int  IsNum __P((char *, int));
 extern int   IsNumColon __P((char *, int, char *, int));
 extern void  ShowWindows __P((int));
 extern char *AddWindows __P((char *, int, int, int));
Only in my.screen-4.0.2: fileio.o
Only in my.screen-4.0.2: help.o
Only in my.screen-4.0.2: input.o
Only in my.screen-4.0.2: kmapdef.c
Only in my.screen-4.0.2: kmapdef.o
Only in my.screen-4.0.2: layer.o
Only in my.screen-4.0.2: loadav.o
Only in my.screen-4.0.2: logfile.o
Only in my.screen-4.0.2: mark.o
Only in my.screen-4.0.2: misc.o
Only in my.screen-4.0.2: nethack.o
Only in my.screen-4.0.2: osdef.h
diff -ur screen-4.0.2/process.c my.screen-4.0.2/process.c
--- screen-4.0.2/process.c	2003-09-18 08:53:54.000000000 -0400
+++ my.screen-4.0.2/process.c	2007-02-20 15:57:44.000000000 -0500
@@ -109,6 +109,7 @@
 static void SaveAction __P((struct action *, int, char **, int *));
 static int  NextWindow __P((void));
 static int  PreviousWindow __P((void));
+static int  LastWindow __P((void));
 static int  MoreWindows __P((void));
 static void LogToggle __P((int));
 static void ShowInfo __P((void));
@@ -120,7 +121,6 @@
 static int  ParseBase __P((struct action *, char *, int *, int, char *));
 static int  ParseNum1000 __P((struct action *, int *));
 static char **SaveArgs __P((char **));
-static int  IsNum __P((char *, int));
 static void Colonfin __P((char *, int, char *));
 static void InputSelect __P((void));
 static void InputSetenv __P((char *));
@@ -474,6 +474,8 @@
   ktab['q'].nr = ktab[Ctrl('q')].nr = RC_XON;
   ktab['s'].nr = ktab[Ctrl('s')].nr = RC_XOFF;
   ktab['t'].nr = ktab[Ctrl('t')].nr = RC_TIME;
+  ktab['T'].nr = RC_TOGGLE;
+  ktab['$'].nr = RC_LASTWIN;
   ktab['i'].nr = ktab[Ctrl('i')].nr = RC_INFO;
   ktab['m'].nr = ktab[Ctrl('m')].nr = RC_LASTMSG;
   ktab['A'].nr = RC_TITLE;
@@ -797,7 +799,7 @@
       fore = D_fore;
       slen = ilen;
       s = ibuf;
-      if (!D_ESCseen)
+      if (!D_ESCseen && !toggle_key)
 	{
 	  while (ilen > 0)
 	    {
@@ -1890,6 +1892,13 @@
       else
 	ChangeAKA(fore, *args, strlen(*args));
       break;
+	case RC_TOGGLE:
+	  toggle_key = !toggle_key;
+	  break;
+	case RC_LASTWIN:
+      if (MoreWindows())
+	SwitchWindow(LastWindow());
+	  break;
     case RC_COLON:
       Input(":", 100, INP_COOKED, Colonfin, NULL);
       if (*args && **args)
@@ -4370,7 +4379,7 @@
   return 0;
 }
 
-static int
+int
 IsNum(s, base)
 register char *s;
 register int base;
@@ -4616,6 +4625,17 @@
 }
 
 static int
+LastWindow()
+{
+  int i;
+
+  for (i=MAXWIN-1; i > -1; i--)
+      if (wtab[i])
+		break;
+  return i;
+}
+
+static int
 PreviousWindow()
 {
   register struct win **pp;
Only in my.screen-4.0.2: process.o
Only in my.screen-4.0.2: pty.o
Only in my.screen-4.0.2: putenv.o
Only in my.screen-4.0.2: resize.o
Only in my.screen-4.0.2: sched.o
Only in my.screen-4.0.2: screen
diff -ur screen-4.0.2/screen.c my.screen-4.0.2/screen.c
--- screen-4.0.2/screen.c	2003-09-08 10:26:41.000000000 -0400
+++ my.screen-4.0.2/screen.c	2007-02-20 15:53:39.000000000 -0500
@@ -356,6 +356,8 @@
 #ifdef MULTIUSER
   char *sockp;
 #endif
+extern int toggle_key;
+toggle_key = 0;
 
 #if (defined(AUX) || defined(_AUX_SOURCE)) && defined(POSIX)
   setcompat(COMPAT_POSIX|COMPAT_BSDPROT); /* turn on seteuid support */
@@ -574,7 +576,9 @@
 		case 'h':
 		  if (--ac == 0)
 		    exit_with_usage(myname, NULL, NULL);
-		  nwin_options.histheight = atoi(*++av);
+          if (!IsNum(*++av, 10))
+ 			  exit_with_usage(myname, "-h: %s: contains a nondigit?", *av);
+		  nwin_options.histheight = atoi(*av);
 		  if (nwin_options.histheight < 0)
 		    exit_with_usage(myname, "-h: %s: negative scrollback size?", *av);
 		  break;
diff -ur screen-4.0.2/screen.h my.screen-4.0.2/screen.h
--- screen-4.0.2/screen.h	2003-08-22 08:28:43.000000000 -0400
+++ my.screen-4.0.2/screen.h	2007-02-20 10:34:13.000000000 -0500
@@ -293,3 +293,5 @@
  */
 #define WLIST_NUM 0
 #define WLIST_MRU 1
+
+int toggle_key;
Only in my.screen-4.0.2: screen.o
Only in my.screen-4.0.2: search.o
Only in my.screen-4.0.2: socket.o
Only in my.screen-4.0.2: tags
Only in my.screen-4.0.2: teln.o
Only in my.screen-4.0.2: term.h
Only in my.screen-4.0.2: term.o
Only in my.screen-4.0.2: termcap.o
Only in my.screen-4.0.2: tty.c
Only in my.screen-4.0.2: tty.o
Only in my.screen-4.0.2: utmp.o
Only in my.screen-4.0.2: window.o