diff --git a/icons/icon-NDLTTS.png b/icons/icon-NDLTTS.png
new file mode 100644
index 000000000..1df3e63b1
Binary files /dev/null and b/icons/icon-NDLTTS.png differ
diff --git a/qt-ui/mainwindow.ui b/qt-ui/mainwindow.ui
index 28f4c816f..26c727efb 100644
--- a/qt-ui/mainwindow.ui
+++ b/qt-ui/mainwindow.ui
@@ -402,14 +402,14 @@
                  <item>
                   <widget class="QToolButton" name="profNdl_tts">
                    <property name="toolTip">
-                    <string>Show NTL / TTS</string>
+                    <string>Show NDL / TTS</string>
                    </property>
                    <property name="text">
                     <string>...</string>
                    </property>
                    <property name="icon">
                     <iconset resource="../subsurface.qrc">
-                     <normaloff>:/trash</normaloff>:/trash</iconset>
+                     <normaloff>:/icon_NDLTTS</normaloff>:/icon_NDLTTS</iconset>
                    </property>
                    <property name="iconSize">
                     <size>
@@ -479,6 +479,9 @@
                  </item>
                  <item>
                   <widget class="QToolButton" name="profScaled">
+                   <property name="toolTip">
+                    <string>Rescale depth axis</string>
+                   </property>
                    <property name="text">
                     <string>...</string>
                    </property>
diff --git a/subsurface.qrc b/subsurface.qrc
index 569b53830..4e0cffd72 100644
--- a/subsurface.qrc
+++ b/subsurface.qrc
@@ -49,6 +49,7 @@
         <file alias="icon_o2">icons/icon-po2graph.png</file>
         <file alias="icon_ceiling_calculated">icons/icon-ceiling-calculated.png</file>
         <file alias="icon_ceiling_alltissues">icons/icon-ceiling-alltissues.png</file>
+        <file alias="icon_NDLTTS">icons/icon-NDLTTS.png</file>
         <file alias="icon_ceiling_3m">icons/icon-ceiling-3m.png</file>
         <file alias="icon_ceiling_dc">icons/icon-ceiling-dc.png</file>
         <file alias="icon_ead">icons/icon-ead.png</file>