diff --git a/src/Mod/TechDraw/Gui/DlgPrefsTechDraw5.ui b/src/Mod/TechDraw/Gui/DlgPrefsTechDraw5.ui
index 466cd632ea..a94633d624 100644
--- a/src/Mod/TechDraw/Gui/DlgPrefsTechDraw5.ui
+++ b/src/Mod/TechDraw/Gui/DlgPrefsTechDraw5.ui
@@ -69,7 +69,7 @@
            </font>
           </property>
           <property name="toolTip">
-           <string>Show Seam Lines</string>
+           <string>Show seam lines</string>
           </property>
           <property name="text">
            <string>Show Seam Lines</string>
@@ -99,7 +99,7 @@
            </font>
           </property>
           <property name="toolTip">
-           <string>Show Smooth Lines</string>
+           <string>Show smooth lines</string>
           </property>
           <property name="text">
            <string>Show Smooth Lines</string>
@@ -135,7 +135,7 @@
            <enum>Qt::NoFocus</enum>
           </property>
           <property name="toolTip">
-           <string>Show Hard and Outline Edges (always shown)</string>
+           <string>Show hard and outline edges (always shown)</string>
           </property>
           <property name="text">
            <string>Show Hard Lines</string>
@@ -144,7 +144,7 @@
            <bool>true</bool>
           </property>
           <property name="checked">
-           <bool>false</bool>
+           <bool>true</bool>
           </property>
           <property name="prefEntry" stdset="0">
            <cstring>HardViz</cstring>
@@ -168,7 +168,8 @@
            </font>
           </property>
           <property name="toolTip">
-           <string>Use an approximation to find hidden lines.  Fast, but results is a collection of short straight lines.</string>
+           <string>Use an approximation to find hidden lines.
+Fast, but result is a collection of short straight lines.</string>
           </property>
           <property name="text">
            <string>Use Polygon Approximation</string>
@@ -198,7 +199,7 @@
            <string>Make lines of equal parameterization</string>
           </property>
           <property name="text">
-           <string>Show UV Iso Lines</string>
+           <string>Show UV ISO Lines</string>
           </property>
           <property name="prefEntry" stdset="0">
            <cstring>IsoViz</cstring>
@@ -249,7 +250,7 @@
            </font>
           </property>
           <property name="toolTip">
-           <string>Show hidden Seam lines</string>
+           <string>Show hidden seam lines</string>
           </property>
           <property name="text">
            <string>Show Seam Lines</string>
@@ -279,7 +280,7 @@
            <string>Show hidden equal parameterization lines</string>
           </property>
           <property name="text">
-           <string>Show UV Iso Lines</string>
+           <string>Show UV ISO Lines</string>
           </property>
           <property name="prefEntry" stdset="0">
            <cstring>IsoHid</cstring>
@@ -317,7 +318,7 @@
            </font>
           </property>
           <property name="toolTip">
-           <string>Show hidden Hard and Outline edges</string>
+           <string>Show hidden hard and outline edges</string>
           </property>
           <property name="text">
            <string>Show Hard Lines</string>
@@ -344,7 +345,7 @@
            </font>
           </property>
           <property name="text">
-           <string>Iso Count</string>
+           <string>ISO Count</string>
           </property>
          </widget>
         </item>
@@ -357,7 +358,7 @@
            </sizepolicy>
           </property>
           <property name="toolTip">
-           <string>Number of Iso lines per Face edge</string>
+           <string>Number of ISO lines per face edge</string>
           </property>
           <property name="prefEntry" stdset="0">
            <cstring>IsoCount</cstring>