diff --git a/melt.html b/melt.html
index b602b63..d63afac 100644
--- a/melt.html
+++ b/melt.html
@@ -5,9 +5,9 @@
             window.addEventListener( 'load', function () {
                 addBoxes(
                     'First',        1, 0, 1, 0,
-                    'Last',         2, 0, 2, 0,
-                    'variable', -1000, 0, 3, 0,
-                    'value',    -1000, 0, 4, 0,
+                    'Last',         2, 0, 2, 0, { w1 : 2, w2 : 2 },
+                    'variable', -1000, 0, 4, 0,
+                    'value',    -1000, 0, 5, 0,
                     '',             0, 0, 0, 0,
                     '3',            0, 3, 0, 4,
                     '4',            0, 3, 0, 5,
@@ -21,15 +21,15 @@
                 );
                 setColor( '#ffdddd' );
                 addBoxes(
-                    'SAT',      3, 0, 3, 1,
-                    'SAT',      3, 0, 3, 2,
-                    'SAT',      3, 0, 3, 3,
-                    'ACT',      4, 0, 3, 4,
-                    'ACT',      4, 0, 3, 5,
-                    'ACT',      4, 0, 3, 6,
-                    'GPA',      5, 0, 3, 7,
-                    'GPA',      5, 0, 3, 8,
-                    'GPA',      5, 0, 3, 9,
+                    'SAT',      4, 0, 4, 1,
+                    'SAT',      4, 0, 4, 2,
+                    'SAT',      4, 0, 4, 3,
+                    'ACT',      5, 0, 4, 4,
+                    'ACT',      5, 0, 4, 5,
+                    'ACT',      5, 0, 4, 6,
+                    'GPA',      6, 0, 4, 7,
+                    'GPA',      6, 0, 4, 8,
+                    'GPA',      6, 0, 4, 9,
                 );
                 setColor( '#dddddd' );
                 addBoxes(
@@ -45,33 +45,33 @@
                 );
                 setColor( '#dddddd' );
                 addBoxes(
-                    'Smith', 2, 1, 2, 1,
-                    'Sully', 2, 2, 2, 2,
-                    'Smart', 2, 3, 2, 3,
-                    'Smith', 2, 1, 2, 4,
-                    'Sully', 2, 2, 2, 5,
-                    'Smart', 2, 3, 2, 6,
-                    'Smith', 2, 1, 2, 7,
-                    'Sully', 2, 2, 2, 8,
-                    'Smart', 2, 3, 2, 9,
+                    'Smith', 2, 1, 2, 1, { w1 : 2, w2 : 2 },
+                    'Sully', 2, 2, 2, 2, { w1 : 2, w2 : 2 },
+                    'Smart', 2, 3, 2, 3, { w1 : 2, w2 : 2 },
+                    'Smith', 2, 1, 2, 4, { w1 : 2, w2 : 2 },
+                    'Sully', 2, 2, 2, 5, { w1 : 2, w2 : 2 },
+                    'Smart', 2, 3, 2, 6, { w1 : 2, w2 : 2 },
+                    'Smith', 2, 1, 2, 7, { w1 : 2, w2 : 2 },
+                    'Sully', 2, 2, 2, 8, { w1 : 2, w2 : 2 },
+                    'Smart', 2, 3, 2, 9, { w1 : 2, w2 : 2 },
                 );
                 setColor( '#ddddff' );
                 addBoxes(
-                    '123', 3, 1, 4, 1,
-                    '234', 3, 2, 4, 2,
-                    '345', 3, 3, 4, 3
+                    '123', 4, 1, 5, 1,
+                    '234', 4, 2, 5, 2,
+                    '345', 4, 3, 5, 3
                 );
                 setColor( '#ddffdd' );
                 addBoxes(
-                    '456', 4, 1, 4, 4,
-                    '567', 4, 2, 4, 5,
-                    '678', 4, 3, 4, 6
+                    '456', 5, 1, 5, 4,
+                    '567', 5, 2, 5, 5,
+                    '678', 5, 3, 5, 6
                 );
                 setColor( '#ffffdd' );
                 addBoxes(
-                    '2.0', 5, 1, 4, 7,
-                    '3.0', 5, 2, 4, 8,
-                    '4.0', 5, 3, 4, 9
+                    '2.0', 6, 1, 5, 7,
+                    '3.0', 6, 2, 5, 8,
+                    '4.0', 6, 3, 5, 9
                 );
             } );
         </script>
diff --git a/pivot-table.html b/pivot-table.html
index 2bc4886..51c8692 100644
--- a/pivot-table.html
+++ b/pivot-table.html
@@ -5,14 +5,14 @@
             window.addEventListener( 'load', function () {
                 addBoxes(
                     'First',        1, 0,     0, 2,
-                    'Last',         2, 0,     1, 2,
-                    'Customer',     3, 0,     1, 1,
-                    'Sale',         4, 0,     2, 0, { w2 : 2 },
+                    'Last',         2, 0,     1, 2, { w1 : 2, w2 : 2 },
+                    'Customer',     4, 0,     1, 1, { w1 : 2, w2 : 2 },
+                    'Sale',         6, 0,     3, 0, { w2 : 4 },
                     '',             0, 0, -1000, 0,
-                    '',         -1000, 0,     2, 2,
-                    '',         -1000, 0,     3, 2,
+                    '',         -1000, 0,     3, 2, { w2 : 2 },
+                    '',         -1000, 0,     5, 2, { w2 : 2 },
                     '',         -1000, 0,     0, 0,
-                    '',         -1000, 0,     1, 0,
+                    '',         -1000, 0,     1, 0, { w2 : 2 },
                     '',         -1000, 0,     0, 1,
                     '0',            0, 1, -1000, 1,
                     '1',            0, 2, -1000, 1,
@@ -23,38 +23,38 @@
                 );
                 setColor( '#dddddd' );
                 addBoxes(
-                    'Abe', 1, 1, 0, 3,
-                    'Abe', 1, 2, 0, 3,
-                    'Abe', 1, 3, 0, 3,
-                    'Amy', 1, 4, 0, 4,
-                    'Amy', 1, 5, 0, 4,
-                    'Amy', 1, 6, 0, 4,
+                    'Amy', 1, 1, 0, 3,
+                    'Amy', 1, 2, 0, 3,
+                    'Amy', 1, 3, 0, 3,
+                    'Bob', 1, 4, 0, 4,
+                    'Bob', 1, 5, 0, 4,
+                    'Bob', 1, 6, 0, 4,
                 );
                 addBoxes(
-                    'Axel', 2, 1, 1, 3,
-                    'Axel', 2, 2, 1, 3,
-                    'Axel', 2, 3, 1, 3,
-                    'Arnt', 2, 4, 1, 4,
-                    'Arnt', 2, 5, 1, 4,
-                    'Arnt', 2, 6, 1, 4,
+                    'Smith', 2, 1, 1, 3, { w1 : 2, w2 : 2 },
+                    'Smith', 2, 2, 1, 3, { w1 : 2, w2 : 2 },
+                    'Smith', 2, 3, 1, 3, { w1 : 2, w2 : 2 },
+                    'Jones', 2, 4, 1, 4, { w1 : 2, w2 : 2 },
+                    'Jones', 2, 5, 1, 4, { w1 : 2, w2 : 2 },
+                    'Jones', 2, 6, 1, 4, { w1 : 2, w2 : 2 },
                 );
                 setColor( '#ddddff' );
                 addBoxes(
-                    'X Co.',  3, 1, 2, 1,
-                    'Y Inc.', 3, 2, 3, 1,
-                    'X Co.',  3, 3, 2, 1,
-                    'Y Inc.', 3, 4, 3, 1,
-                    'X Co.',  3, 5, 2, 1,
-                    'Y Inc.', 3, 6, 3, 1,
+                    'Facebook',  4, 1, 3, 1, { w1 : 2, w2 : 2 },
+                    'Amazon',    4, 2, 5, 1, { w1 : 2, w2 : 2 },
+                    'Facebook',  4, 3, 3, 1, { w1 : 2, w2 : 2 },
+                    'Amazon',    4, 4, 5, 1, { w1 : 2, w2 : 2 },
+                    'Facebook',  4, 5, 3, 1, { w1 : 2, w2 : 2 },
+                    'Amazon',    4, 6, 5, 1, { w1 : 2, w2 : 2 },
                 );
                 setColor( '#ddffdd' );
                 addBoxes(
-                    '39', 4, 1, 2, 3,
-                    '68', 4, 2, 3, 3,
-                    '10', 4, 3, 2, 3,
-                    '93', 4, 4, 3, 4,
-                    '85', 4, 5, 2, 4,
-                    '0',  4, 6, 3, 4,
+                    '39', 6, 1, 3, 3, { w2 : 2 },
+                    '68', 6, 2, 5, 3, { w2 : 2 },
+                    '10', 6, 3, 3, 3, { w2 : 2 },
+                    '93', 6, 4, 5, 4, { w2 : 2 },
+                    '85', 6, 5, 3, 4, { w2 : 2 },
+                    '20',  6, 6, 5, 4, { w2 : 2 },
                 );
             } );
         </script>
diff --git a/pivot.html b/pivot.html
index db3feb8..f93d5ba 100644
--- a/pivot.html
+++ b/pivot.html
@@ -4,46 +4,46 @@
         <script>
             window.addEventListener( 'load', function () {
                 addBoxes(
-                    'Name',   1, 0,     0, 1,
-                    'Day',    2, 0,     0, 0,
-                    'Sales',  3, 0, -1000, 0,
+                    'Name',   1, 0,     0, 1, { w1: 2, w2: 2 },
+                    'Day',    3, 0,     0, 0, { w1: 2, w2: 2 },
+                    'Sales',  5, 0, -1000, 0,
                     '0',      0, 1, -1000, 0,
                     '1',      0, 2, -1000, 0,
                     '2',      0, 3, -1000, 0,
                     '3',      0, 4, -1000, 0,
                     '4',      0, 5, -1000, 0,
                     '5',      0, 6, -1000, 0,
-                    '',   -1000, 0,     1, 1,
-                    '',   -1000, 0,     2, 1,
-                    '',   -1000, 0,     3, 1,
+                    '',   -1000, 0,     2, 1, { w2: 2 },
+                    '',   -1000, 0,     4, 1, { w2: 2 },
+                    '',   -1000, 0,     6, 1, { w2: 2 },
                     '',       0, 0, -1000, 0,
                 );
                 setColor( '#dddddd' );
                 addBoxes(
-                    'Abe', 1, 1, 0, 2,
-                    'Abe', 1, 2, 0, 2,
-                    'Abe', 1, 3, 0, 2,
-                    'Amy', 1, 4, 0, 3,
-                    'Amy', 1, 5, 0, 3,
-                    'Amy', 1, 6, 0, 3,
+                    'Amy Smith', 1, 1, 0, 2, { w1: 2, w2: 2 },
+                    'Amy Smith', 1, 2, 0, 2, { w1: 2, w2: 2 },
+                    'Amy Smith', 1, 3, 0, 2, { w1: 2, w2: 2 },
+                    'Bob Jones', 1, 4, 0, 3, { w1: 2, w2: 2 },
+                    'Bob Jones', 1, 5, 0, 3, { w1: 2, w2: 2 },
+                    'Bob Jones', 1, 6, 0, 3, { w1: 2, w2: 2 },
                 );
                 setColor( '#ddddff' );
                 addBoxes(
-                    'Mon', 2, 1, 1, 0,
-                    'Tue', 2, 2, 2, 0,
-                    'Wed', 2, 3, 3, 0,
-                    'Mon', 2, 4, 1, 0,
-                    'Tue', 2, 5, 2, 0,
-                    'Wed', 2, 6, 3, 0,
+                    'Monday',    3, 1, 2, 0, { w1: 2, w2: 2 },
+                    'Tuesday',   3, 2, 4, 0, { w1: 2, w2: 2 },
+                    'Wednesday', 3, 3, 6, 0, { w1: 2, w2: 2 },
+                    'Monday',    3, 4, 2, 0, { w1: 2, w2: 2 },
+                    'Tuesday',   3, 5, 4, 0, { w1: 2, w2: 2 },
+                    'Wednesday', 3, 6, 6, 0, { w1: 2, w2: 2 },
                 );
                 setColor( '#ddffdd' );
                 addBoxes(
-                    '39', 3, 1, 1, 2,
-                    '68', 3, 2, 2, 2,
-                    '10', 3, 3, 3, 2,
-                    '93', 3, 4, 1, 3,
-                    '85', 3, 5, 2, 3,
-                    '0',  3, 6, 3, 3,
+                    '39', 5, 1, 2, 2, { w2: 2 },
+                    '68', 5, 2, 4, 2, { w2: 2 },
+                    '10', 5, 3, 6, 2, { w2: 2 },
+                    '93', 5, 4, 2, 3, { w2: 2 },
+                    '85', 5, 5, 4, 3, { w2: 2 },
+                    '0',  5, 6, 6, 3, { w2: 2 },
                 );
             } );
         </script>
diff --git a/stack-0.html b/stack-0.html
index e2f7d5e..187a386 100644
--- a/stack-0.html
+++ b/stack-0.html
@@ -4,56 +4,56 @@
         <script>
             window.addEventListener( 'load', function () {
                 addBoxes(
-                    '',       0, 0,     0, 0,
-                    '',       1, 0, -1000, 0,
-                    '',       2, 1,     1, 2,
-                    '',       2, 1,     2, 2,
-                    '',       3, 1,     3, 2,
-                    '',       3, 1,     4, 2,
-                    'Month',  0, 1,     0, 1,
-                    'Week',   1, 1,     0, 2,
-                    'Temp',   2, 0,     1, 0, { w2 : 2 },
-                    'Humid',  3, 0,     3, 0, { w2 : 2 },
+                    '',            0, 0,     0, 0, { w1 : 2, w2 : 1 },
+                    '',            2, 0, -1000, 0,
+                    '',            3, 1,     1, 2, { w1 : 2, w2 : 2 },
+                    '',            5, 1,     3, 2, { w1 : 2, w2 : 2 },
+                    '',            3, 1,     5, 2, { w1 : 2, w2 : 2 },
+                    '',            3, 1,     7, 2, { w1 : 2, w2 : 2 },
+                    'Month',       0, 1,     0, 1, { w1 : 2, w2 : 1 },
+                    'Week',        2, 1,     0, 2,
+                    'Temperature', 3, 0,     1, 0, { w1 : 2, w2 : 4 },
+                    'Humidity',    5, 0,     5, 0, { w1 : 2, w2 : 4 },
                 );
                 setColor( '#dddddd' );
                 addBoxes(
-                    'Jan', 0, 2, 1, 1, { h1 : 4 },
-                    'Jan', 0, 2, 3, 1, { h1 : 4 },
-                    'Feb', 0, 6, 2, 1, { h1 : 4 },
-                    'Feb', 0, 6, 4, 1, { h1 : 4 },
+                    'January',  0, 2, 1, 1, { h1 : 4, w1 : 2, w2 : 2 },
+                    'January',  0, 2, 5, 1, { h1 : 4, w1 : 2, w2 : 2 },
+                    'February', 0, 6, 3, 1, { h1 : 4, w1 : 2, w2 : 2 },
+                    'February', 0, 6, 7, 1, { h1 : 4, w1 : 2, w2 : 2 },
                 );
                 setColor( '#ddffdd' );
                 addBoxes(
-                    '1', 1, 2, 0, 3,
-                    '2', 1, 3, 0, 4,
-                    '3', 1, 4, 0, 5,
-                    '4', 1, 5, 0, 6,
-                    '1', 1, 6, 0, 3,
-                    '2', 1, 7, 0, 4,
-                    '3', 1, 8, 0, 5,
-                    '4', 1, 9, 0, 6,
+                    '1', 2, 2, 0, 3,
+                    '2', 2, 3, 0, 4,
+                    '3', 2, 4, 0, 5,
+                    '4', 2, 5, 0, 6,
+                    '1', 2, 6, 0, 3,
+                    '2', 2, 7, 0, 4,
+                    '3', 2, 8, 0, 5,
+                    '4', 2, 9, 0, 6,
                 );
                 setColor( '#ddddff' );
                 addBoxes(
-                    '31', 2, 2, 1, 3,
-                    '29', 2, 3, 1, 4,
-                    '26', 2, 4, 1, 5,
-                    '27', 2, 5, 1, 6,
-                    '25', 2, 6, 2, 3,
-                    '19', 2, 7, 2, 4,
-                    '22', 2, 8, 2, 5,
-                    '25', 2, 9, 2, 6,
+                    '31', 3, 2, 1, 3, { w1 : 2, w2 : 2 },
+                    '29', 3, 3, 1, 4, { w1 : 2, w2 : 2 },
+                    '26', 3, 4, 1, 5, { w1 : 2, w2 : 2 },
+                    '27', 3, 5, 1, 6, { w1 : 2, w2 : 2 },
+                    '25', 3, 6, 3, 3, { w1 : 2, w2 : 2 },
+                    '19', 3, 7, 3, 4, { w1 : 2, w2 : 2 },
+                    '22', 3, 8, 3, 5, { w1 : 2, w2 : 2 },
+                    '25', 3, 9, 3, 6, { w1 : 2, w2 : 2 },
                 );
                 setColor( '#ffffdd' );
                 addBoxes(
-                    '15', 3, 2, 3, 3,
-                    '20', 3, 3, 3, 4,
-                    '5',  3, 4, 3, 5,
-                    '14', 3, 5, 3, 6,
-                    '9',  3, 6, 4, 3,
-                    '14', 3, 7, 4, 4,
-                    '20', 3, 8, 4, 5,
-                    '19', 3, 9, 4, 6,
+                    '15', 5, 2, 5, 3, { w1 : 2, w2 : 2 },
+                    '20', 5, 3, 5, 4, { w1 : 2, w2 : 2 },
+                    '5',  5, 4, 5, 5, { w1 : 2, w2 : 2 },
+                    '14', 5, 5, 5, 6, { w1 : 2, w2 : 2 },
+                    '9',  5, 6, 7, 3, { w1 : 2, w2 : 2 },
+                    '14', 5, 7, 7, 4, { w1 : 2, w2 : 2 },
+                    '20', 5, 8, 7, 5, { w1 : 2, w2 : 2 },
+                    '19', 5, 9, 7, 6, { w1 : 2, w2 : 2 },
                 );
             } );
         </script>
diff --git a/stack-1.html b/stack-1.html
index a49db44..db0707b 100644
--- a/stack-1.html
+++ b/stack-1.html
@@ -4,58 +4,58 @@
         <script>
             window.addEventListener( 'load', function () {
                 addBoxes(
-                    '',       0, 0,     0, 0,
-                    '',       1, 0, -1000, 0,
-                    '',       2, 1,     1, 2,
-                    '',       2, 1,     2, 2,
-                    '',       3, 1,     3, 2,
-                    '',       3, 1,     4, 2,
-                    '',       2, 1,     5, 2,
-                    '',       2, 1,     6, 2,
-                    '',       3, 1,     7, 2,
-                    '',       3, 1,     8, 2,
-                    'Month',  0, 1,     0, 2,
-                    'Week',   1, 1,     0, 1,
-                    'Temp',   2, 0,     1, 0, { w2 : 4 },
-                    'Humid',  3, 0,     5, 0, { w2 : 4 },
+                    '',            0, 0,     0, 0, { w1 : 2, w2 : 2 },
+                    '',            2, 0, -1000, 0,
+                    '',            3, 1,     2, 2, { w1 : 2 },
+                    '',            3, 1,     3, 2, { w1 : 2 },
+                    '',            5, 1,     4, 2, { w1 : 2 },
+                    '',            5, 1,     5, 2, { w1 : 2 },
+                    '',            3, 1,     6, 2, { w1 : 2 },
+                    '',            3, 1,     7, 2, { w1 : 2 },
+                    '',            5, 1,     8, 2, { w1 : 2 },
+                    '',            5, 1,     9, 2, { w1 : 2 },
+                    'Month',       0, 1,     0, 2, { w1 : 2, w2 : 2 },
+                    'Week',        2, 1,     0, 1, { w2 : 2 },
+                    'Temperature', 3, 0,     2, 0, { w1 : 2, w2 : 4 },
+                    'Humidity',    5, 0,     6, 0, { w1 : 2, w2 : 4 },
                 );
                 setColor( '#dddddd' );
                 addBoxes(
-                    'Jan', 0, 2, 0, 3, { h1 : 4 },
-                    'Feb', 0, 6, 0, 4, { h1 : 4 },
+                    'January',  0, 2, 0, 3, { h1 : 4, w1 : 2, w2 : 2 },
+                    'February', 0, 6, 0, 4, { h1 : 4, w1 : 2, w2 : 2 },
                 );
                 setColor( '#ddffdd' );
                 addBoxes(
-                    '1', 1, 2, 1, 1,
-                    '2', 1, 3, 2, 1,
-                    '3', 1, 4, 3, 1,
-                    '4', 1, 5, 4, 1,
-                    '1', 1, 6, 5, 1,
-                    '2', 1, 7, 6, 1,
-                    '3', 1, 8, 7, 1,
-                    '4', 1, 9, 8, 1,
+                    '1', 2, 2, 2, 1,
+                    '2', 2, 3, 3, 1,
+                    '3', 2, 4, 4, 1,
+                    '4', 2, 5, 5, 1,
+                    '1', 2, 6, 6, 1,
+                    '2', 2, 7, 7, 1,
+                    '3', 2, 8, 8, 1,
+                    '4', 2, 9, 9, 1,
                 );
                 setColor( '#ddddff' );
                 addBoxes(
-                    '31', 2, 2, 1, 3,
-                    '29', 2, 3, 2, 3,
-                    '26', 2, 4, 3, 3,
-                    '27', 2, 5, 4, 3,
-                    '25', 2, 6, 1, 4,
-                    '19', 2, 7, 2, 4,
-                    '22', 2, 8, 3, 4,
-                    '25', 2, 9, 4, 4,
+                    '31', 3, 2, 2, 3, { w1 : 2 },
+                    '29', 3, 3, 3, 3, { w1 : 2 },
+                    '26', 3, 4, 4, 3, { w1 : 2 },
+                    '27', 3, 5, 5, 3, { w1 : 2 },
+                    '25', 3, 6, 2, 4, { w1 : 2 },
+                    '19', 3, 7, 3, 4, { w1 : 2 },
+                    '22', 3, 8, 4, 4, { w1 : 2 },
+                    '25', 3, 9, 5, 4, { w1 : 2 },
                 );
                 setColor( '#ffffdd' );
                 addBoxes(
-                    '15', 3, 2, 5, 3,
-                    '20', 3, 3, 6, 3,
-                    '5',  3, 4, 7, 3,
-                    '14', 3, 5, 8, 3,
-                    '9',  3, 6, 5, 4,
-                    '14', 3, 7, 6, 4,
-                    '20', 3, 8, 7, 4,
-                    '19', 3, 9, 8, 4,
+                    '15', 5, 2, 6, 3, { w1 : 2 },
+                    '20', 5, 3, 7, 3, { w1 : 2 },
+                    '5',  5, 4, 8, 3, { w1 : 2 },
+                    '14', 5, 5, 9, 3, { w1 : 2 },
+                    '9',  5, 6, 6, 4, { w1 : 2 },
+                    '14', 5, 7, 7, 4, { w1 : 2 },
+                    '20', 5, 8, 8, 4, { w1 : 2 },
+                    '19', 5, 9, 9, 4, { w1 : 2 },
                 );
             } );
         </script>