--- OLD/pnm/pnmpaste.c	Thu Jan  1 00:00:00 1970
+++ NEW/pnm/pnmpaste.c	Thu Jan  1 00:00:00 1970
@@ -46,6 +46,10 @@
 	    function = 'a';
 	else if ( pm_keymatch( argv[argn], "-xor", 2 ) )
 	    function = 'x';
+	else if ( pm_keymatch( argv[argn], "-min", 3 ) )
+	    function = '<';
+	else if ( pm_keymatch( argv[argn], "-max", 3 ) )
+	    function = '>';
 	else
 	    pm_usage( usage );
 	++argn;
@@ -113,8 +117,11 @@
     newformat = max( PNM_FORMAT_TYPE(format1), PNM_FORMAT_TYPE(format2) );
     newmaxval = max( maxval1, maxval2 );
 
-    if ( function != 'r' && newformat != PBM_TYPE )
-	pm_error( "no logical operations allowed for non-bitmaps" );
+      switch (function)
+       { case 'a': case 'o': case 'x':
+	    pm_error( "no logical operations allowed for non-bitmaps" );
+	    break;
+       }
 
     pnm_writepnminit( stdout, cols2, rows2, newmaxval, newformat, 0 );
 
@@ -138,6 +145,30 @@
 		    {
 		    case 'r':
 		    *x2P = *x1P;
+		    break;
+
+		    case '<':
+			  { xel p;
+			    xel p2;
+			    p = *x1P;
+			    p2 = *x2P;
+			    PPM_ASSIGN(*x2P,
+				(PPM_GETR(p) < PPM_GETR(p2)) ? PPM_GETR(p) : PPM_GETR(p2),
+				(PPM_GETG(p) < PPM_GETG(p2)) ? PPM_GETG(p) : PPM_GETG(p2),
+				(PPM_GETB(p) < PPM_GETB(p2)) ? PPM_GETB(p) : PPM_GETB(p2));
+			  }
+		    break;
+
+		    case '>':
+			  { xel p;
+			    xel p2;
+			    p = *x1P;
+			    p2 = *x2P;
+			    PPM_ASSIGN(*x2P,
+				(PPM_GETR(p) > PPM_GETR(p2)) ? PPM_GETR(p) : PPM_GETR(p2),
+				(PPM_GETG(p) > PPM_GETG(p2)) ? PPM_GETG(p) : PPM_GETG(p2),
+				(PPM_GETB(p) > PPM_GETB(p2)) ? PPM_GETB(p) : PPM_GETB(p2));
+			  }
 		    break;
 
 		    case 'o':