diff --git a/public_html/images/altitude_legend.png b/public_html/images/altitude_legend.png
new file mode 100644
index 0000000..2562dad
Binary files /dev/null and b/public_html/images/altitude_legend.png differ
diff --git a/public_html/images/altitude_legend@2x.png b/public_html/images/altitude_legend@2x.png
new file mode 100644
index 0000000..e0b7fdf
Binary files /dev/null and b/public_html/images/altitude_legend@2x.png differ
diff --git a/public_html/images/altitude_legend@3x.png b/public_html/images/altitude_legend@3x.png
new file mode 100644
index 0000000..5f6d192
Binary files /dev/null and b/public_html/images/altitude_legend@3x.png differ
diff --git a/public_html/images/box-checked@2x.png b/public_html/images/box-checked@2x.png
new file mode 100644
index 0000000..8a75b86
Binary files /dev/null and b/public_html/images/box-checked@2x.png differ
diff --git a/public_html/images/box-checked@3x.png b/public_html/images/box-checked@3x.png
new file mode 100644
index 0000000..ae85a45
Binary files /dev/null and b/public_html/images/box-checked@3x.png differ
diff --git a/public_html/images/box-empty@2x.png b/public_html/images/box-empty@2x.png
new file mode 100644
index 0000000..3990ff5
Binary files /dev/null and b/public_html/images/box-empty@2x.png differ
diff --git a/public_html/images/box-empty@3x.png b/public_html/images/box-empty@3x.png
new file mode 100644
index 0000000..7aa7e2b
Binary files /dev/null and b/public_html/images/box-empty@3x.png differ
diff --git a/public_html/index.html b/public_html/index.html
index c19db46..f1cc030 100644
--- a/public_html/index.html
+++ b/public_html/index.html
@@ -242,12 +242,15 @@
 
 			<div id="map_container">
 				<div id="map_canvas"></div>
-                                <div id="toggle_sidebar_control" class="ol-unselectable ol-control">
-                                  <button id="toggle_sidebar_button" class="hide_sidebar" title="Toggle Sidebar"></button>
-                                </div>
-                                <div id="expand_sidebar_control" class="ol-unselectable ol-control">
-                                  <button id="expand_sidebar_button" title="Expand Sidebar"></button>
-                                </div>
+				<div id="toggle_sidebar_control" class="ol-unselectable ol-control">
+					<button id="toggle_sidebar_button" class="hide_sidebar" title="Toggle Sidebar"></button>
+				</div>
+				<div id="expand_sidebar_control" class="ol-unselectable ol-control">
+					<button id="expand_sidebar_button" title="Expand Sidebar"></button>
+				</div>
+				<div id="altitude_chart" class="ol-unselectable ol-control">
+					<button id="altitude_chart_button"></button>
+				</div>
 			</div>
 			<div id="sidebar_container">
 				<div id="splitter" class="ui-resizable-handle ui-resizable-w"></div>
diff --git a/public_html/planeObject.js b/public_html/planeObject.js
index 2fa769c..99fb3fa 100644
--- a/public_html/planeObject.js
+++ b/public_html/planeObject.js
@@ -115,7 +115,8 @@ PlaneObject.prototype.updateTrack = function(estimate_time) {
                                head_update: this.last_position_time,
                                tail_update: this.last_position_time,
                                estimated: false,
-                               ground: (this.altitude === "ground")
+                               ground: (this.altitude === "ground"),
+                               altitude: this.altitude
                              };
                 this.track_linesegs.push(newseg);
                 this.history_size ++;
@@ -176,6 +177,7 @@ PlaneObject.prototype.updateTrack = function(estimate_time) {
                                            head_update: this.last_position_time,
                                            tail_update: this.last_position_time,
                                            estimated: false,
+                                           altitude: this.altitude,
                                            ground: (this.altitude === "ground") });
                 this.history_size += 3;
                 return true;
@@ -236,33 +238,11 @@ PlaneObject.prototype.getMarkerColor = function() {
 
         var h, s, l;
 
-        if (this.altitude === null) {
-                h = ColorByAlt.unknown.h;
-                s = ColorByAlt.unknown.s;
-                l = ColorByAlt.unknown.l;
-        } else if (this.altitude === "ground") {
-                h = ColorByAlt.ground.h;
-                s = ColorByAlt.ground.s;
-                l = ColorByAlt.ground.l;
-        } else {
-                s = ColorByAlt.air.s;
-                l = ColorByAlt.air.l;
+        var colorArr = this.getAltitudeColor();
 
-                // find the pair of points the current altitude lies between,
-                // and interpolate the hue between those points
-                var hpoints = ColorByAlt.air.h;
-                h = hpoints[0].val;
-                for (var i = hpoints.length-1; i >= 0; --i) {
-                        if (this.altitude > hpoints[i].alt) {
-                                if (i == hpoints.length-1) {
-                                        h = hpoints[i].val;
-                                } else {
-                                        h = hpoints[i].val + (hpoints[i+1].val - hpoints[i].val) * (this.altitude - hpoints[i].alt) / (hpoints[i+1].alt - hpoints[i].alt)
-                                }
-                                break;
-                        }
-                }
-        }
+        h = colorArr[0];
+        s = colorArr[1];
+        l = colorArr[2];
 
         // If we have not seen a recent position update, change color
         if (this.seen_pos > 15) {
@@ -300,6 +280,56 @@ PlaneObject.prototype.getMarkerColor = function() {
         return 'hsl(' + (h/5).toFixed(0)*5 + ',' + (s/5).toFixed(0)*5 + '%,' + (l/5).toFixed(0)*5 + '%)'
 }
 
+PlaneObject.prototype.getAltitudeColor = function(altitude) {
+        var h, s, l;
+
+        if (typeof altitude === 'undefined') {
+            altitude = this.altitude;
+        }
+
+        if (altitude === null) {
+                h = ColorByAlt.unknown.h;
+                s = ColorByAlt.unknown.s;
+                l = ColorByAlt.unknown.l;
+        } else if (this.altitude === "ground") {
+                h = ColorByAlt.ground.h;
+                s = ColorByAlt.ground.s;
+                l = ColorByAlt.ground.l;
+        } else {
+                s = ColorByAlt.air.s;
+                l = ColorByAlt.air.l;
+
+                // find the pair of points the current altitude lies between,
+                // and interpolate the hue between those points
+                var hpoints = ColorByAlt.air.h;
+                h = hpoints[0].val;
+                for (var i = hpoints.length-1; i >= 0; --i) {
+                        if (altitude > hpoints[i].alt) {
+                                if (i == hpoints.length-1) {
+                                        h = hpoints[i].val;
+                                } else {
+                                        h = hpoints[i].val + (hpoints[i+1].val - hpoints[i].val) * (altitude - hpoints[i].alt) / (hpoints[i+1].alt - hpoints[i].alt)
+                                }
+                                break;
+                        }
+                }
+        }
+
+         if (h < 0) {
+                h = (h % 360) + 360;
+        } else if (h >= 360) {
+                h = h % 360;
+        }
+
+        if (s < 5) s = 5;
+        else if (s > 95) s = 95;
+
+        if (l < 5) l = 5;
+        else if (l > 95) l = 95;
+
+        return [h, s, l];
+}
+
 PlaneObject.prototype.updateIcon = function() {
         var scaleFactor = Math.max(0.2, Math.min(1.2, 0.15 * Math.pow(1.25, ZoomLvl))).toFixed(1);
 
@@ -500,6 +530,18 @@ PlaneObject.prototype.updateMarker = function(moved) {
 	}
 };
 
+
+// return the styling of the lines based on altitude
+PlaneObject.prototype.altitudeLines = function(altitude) {
+    var colorArr = this.getAltitudeColor(altitude);
+    return new ol.style.Style({
+        stroke: new ol.style.Stroke({
+            color: 'hsl(' + (colorArr[0]/5).toFixed(0)*5 + ',' + (colorArr[1]/5).toFixed(0)*5 + '%,' + (colorArr[2]/5).toFixed(0)*5 + '%)',
+            width: 2
+        })
+    })
+}
+
 // Update our planes tail line,
 PlaneObject.prototype.updateLines = function() {
         if (!this.selected)
@@ -542,7 +584,7 @@ PlaneObject.prototype.updateLines = function() {
         var lastfixed = lastseg.fixed.getCoordinateAt(1.0);
         var geom = new ol.geom.LineString([lastfixed, ol.proj.fromLonLat(this.position)]);
         this.elastic_feature = new ol.Feature(geom);
-        this.elastic_feature.setStyle(this.altitude === 'ground' ? groundStyle : airStyle);
+        this.elastic_feature.setStyle(this.altitudeLines(this.altitude));
 
         if (oldElastic < 0) {
                 PlaneTrailFeatures.push(this.elastic_feature);
@@ -557,10 +599,8 @@ PlaneObject.prototype.updateLines = function() {
                         seg.feature = new ol.Feature(seg.fixed);
                         if (seg.estimated) {
                                 seg.feature.setStyle(estimateStyle);
-                        } else if (seg.ground) {
-                                seg.feature.setStyle(groundStyle);
                         } else {
-                                seg.feature.setStyle(airStyle);
+                                seg.feature.setStyle(this.altitudeLines(seg.altitude));
                         }
 
                         PlaneTrailFeatures.push(seg.feature);
diff --git a/public_html/script.js b/public_html/script.js
index ed2d4f4..5c9c592 100644
--- a/public_html/script.js
+++ b/public_html/script.js
@@ -520,7 +520,7 @@ function initialize_map() {
                 }),
                 controls: [new ol.control.Zoom(),
                            new ol.control.Rotate(),
-                           new ol.control.Attribution({collapsed: false}),
+                           new ol.control.Attribution({collapsed: true}),
                            new ol.control.ScaleLine({units: DisplayUnits}),
                            new ol.control.LayerSwitcher()
                           ],
diff --git a/public_html/style.css b/public_html/style.css
index 809233a..aa92c9d 100644
--- a/public_html/style.css
+++ b/public_html/style.css
@@ -53,34 +53,10 @@ html, body {
 
 #toggle_sidebar_button.show_sidebar {
     background-image: url("images/table-icon.png");
-    background-image: 
-        -webkit-image-set(
-            "images/table-icon.png" 1x,
-            "images/table-icon@2x.png" 2x,
-            "images/table-icon@3x.png" 3x
-        );
-    background-image: 
-        -image-set(
-            "images/table-icon.png" 1x,
-            "images/table-icon@2x.png" 2x,
-            "images/table-icon@3x.png" 3x
-        );
 }
 
 #toggle_sidebar_button.hide_sidebar {
     background-image: url("images/map-icon.png");
-    background-image: 
-        -webkit-image-set(
-            "images/map-icon.png" 1x,
-            "images/map-icon@2x.png" 2x,
-            "images/map-icon@3x.png" 3x
-        );
-    background-image: 
-        -image-set(
-            "images/map-icon.png" 1x,
-            "images/map-icon@2x.png" 2x,
-            "images/map-icon@3x.png" 3x
-        );
 }
 
 #expand_sidebar_control {
@@ -104,18 +80,6 @@ html, body {
 
 #expand_sidebar_button {
     background-image: url("images/table-icon.png");
-    background-image: 
-        -webkit-image-set(
-            "images/table-icon.png" 1x,
-            "images/table-icon@2x.png" 2x,
-            "images/table-icon@3x.png" 3x
-        );
-    background-image: 
-        -image-set(
-            "images/table-icon.png" 1x,
-            "images/table-icon@2x.png" 2x,
-            "images/table-icon@3x.png" 3x
-        );
 }
 
 #sidebar_container {
@@ -140,34 +104,10 @@ html, body {
     background-color: transparent;
     border: none;
     background-image: url("images/column-adjust.png");
-    background-image: 
-        -webkit-image-set(
-            "images/column-adjust.png" 1x,
-            "images/column-adjust@2x.png" 2x,
-            "images/column-adjust@3x.png" 3x
-        );
-    background-image: 
-        -image-set(
-            "images/column-adjust.png" 1x,
-            "images/column-adjust@2x.png" 2x,
-            "images/column-adjust@3x.png" 3x
-        );
 }
 
 .ol-zoom-in {
     background-image: url("images/zoom-in.png");
-    background-image: 
-        -webkit-image-set(
-            "images/zoom-in.png" 1x,
-            "images/zoom-in@2x.png" 2x,
-            "images/zoom-in@3x.png" 3x
-        );
-    background-image: 
-        -image-set(
-            "images/zoom-in.png" 1x,
-            "images/zoom-in@2x.png" 2x,
-            "images/zoom-in@3x.png" 3x
-        );
     color:transparent !important;
     width: 19px !important;
     height: 19px !important;
@@ -177,18 +117,6 @@ html, body {
 
 .ol-zoom-out {
     background-image: url("images/zoom-out.png");
-    background-image: 
-        -webkit-image-set(
-            "images/zoom-out.png" 1x,
-            "images/zoom-out@2x.png" 2x,
-            "images/zoom-out@3x.png" 3x
-        );
-    background-image: 
-        -image-set(
-            "images/zoom-out.png" 1x,
-            "images/zoom-out@2x.png" 2x,
-            "images/zoom-out@3x.png" 3x
-        );
     color:transparent !important;
     width: 19px !important;
     height: 19px !important;
@@ -667,4 +595,82 @@ select.error, textarea.error, input.error {
 .settingsText {
     line-height: 20px;
     display: table-cell;
+}
+
+#altitude_chart {
+    float: right;
+    width: 502px;
+    height: 18px;
+    right: 40px;
+    bottom: 10px;
+    background-color: transparent !important;
+}
+
+#altitude_chart_button {
+    background-image: url('images/altitude_legend.png');
+    background-color: transparent;
+    width: 502px;
+    height: 18px;
+}
+
+/* Retina 2x images */
+@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) { 
+    #altitude_chart_button {
+        background-image: url('images/altitude_legend@2x.png');
+    }
+    .settingsCheckboxChecked {
+        background-image: url('images/box-checked@2x.png') !important;
+    }
+    .settingsCheckbox {
+        background-image: url('images/box-empty@2x.png');
+    }
+    .ol-zoom-out {
+        background-image: url("images/zoom-out@2x.png");
+    }
+    .ol-zoom-in {
+        background-image: url("images/zoom-in@2x.png");
+    }
+    #splitter {
+        background-image: url("images/column-adjust@2x.png");
+    }
+    #toggle_sidebar_button.show_sidebar {
+        background-image: url("images/table-icon@2x.png");
+    }
+    #expand_sidebar_button {
+        background-image: url("images/table-icon@2x.png");
+    }
+    #toggle_sidebar_button.hide_sidebar {
+        background-image: url("images/map-icon@2x.png");
+    }
+}
+
+/* Retina 3x images */
+@media (-webkit-min-device-pixel-ratio: 3), (min-resolution: 192dpi) { 
+    #altitude_chart_button {
+        background-image: url('images/altitude_legend@3x.png');
+    }
+    .settingsCheckboxChecked {
+        background-image: url('images/box-checked@3x.png') !important;
+    }
+    .settingsCheckbox {
+        background-image: url('images/box-empty@3x.png');
+    }
+    .ol-zoom-out {
+        background-image: url("images/zoom-out@3x.png");
+    }
+    .ol-zoom-in {
+        background-image: url("images/zoom-in@3x.png");
+    }
+    #splitter {
+        background-image: url("images/column-adjust@3x.png");
+    }
+    #toggle_sidebar_button.show_sidebar {
+        background-image: url("images/table-icon@3x.png");
+    }
+    #expand_sidebar_button {
+        background-image: url("images/table-icon@3x.png");
+    }
+    #toggle_sidebar_button.hide_sidebar {
+        background-image: url("images/map-icon@3x.png");
+    }
 }
\ No newline at end of file