diff --git a/src/app/dialogs/tools/dialogheight.cpp b/src/app/dialogs/tools/dialogheight.cpp
index 4fc9815a1..62a3c187d 100644
--- a/src/app/dialogs/tools/dialogheight.cpp
+++ b/src/app/dialogs/tools/dialogheight.cpp
@@ -31,6 +31,7 @@
 
 #include "../../geometry/vpointf.h"
 #include "../../container/vcontainer.h"
+#include "../../tools/vabstracttool.h"
 
 //---------------------------------------------------------------------------------------------------------------------
 /**
@@ -180,11 +181,20 @@ void DialogHeight::DialogAccepted()
 void DialogHeight::PointNameChanged()
 {
     QSet<quint32> set;
-    set.insert(getCurrentObjectId(ui->comboBoxBasePoint));
-    set.insert(getCurrentObjectId(ui->comboBoxP1Line));
-    set.insert(getCurrentObjectId(ui->comboBoxP2Line));
+    const quint32 basePointId = getCurrentObjectId(ui->comboBoxBasePoint);
+    const quint32 p1LineId = getCurrentObjectId(ui->comboBoxP1Line);
+    const quint32 p2LineId = getCurrentObjectId(ui->comboBoxP2Line);
 
-    if (set.size() != 3)
+    set.insert(basePointId);
+    set.insert(p1LineId);
+    set.insert(p2LineId);
+
+    const VPointF *basePoint = data->GeometricObject<const VPointF *>(basePointId);
+    const VPointF *p1Line = data->GeometricObject<const VPointF *>(p1LineId);
+    const VPointF *p2Line = data->GeometricObject<const VPointF *>(p2LineId);
+
+    if (set.size() != 3 || VAbstractTool::ClosestPoint(QLineF(p1Line->toQPointF(), p2Line->toQPointF()),
+                                                       basePoint->toQPointF()) == QPointF())
     {
         flagError = false;
         ChangeColor(ui->labelBasePoint, Qt::red);
diff --git a/src/app/dialogs/tools/dialoglineintersect.cpp b/src/app/dialogs/tools/dialoglineintersect.cpp
index 82fe6f5b9..619d090bb 100644
--- a/src/app/dialogs/tools/dialoglineintersect.cpp
+++ b/src/app/dialogs/tools/dialoglineintersect.cpp
@@ -54,6 +54,14 @@ DialogLineIntersect::DialogLineIntersect(const VContainer *data, QWidget *parent
     FillComboBoxPoints(ui->comboBoxP2Line2);
 
     connect(ui->lineEditNamePoint, &QLineEdit::textChanged, this, &DialogLineIntersect::NamePointChanged);
+    connect(ui->comboBoxP1Line1, static_cast<void (QComboBox::*)(const QString &)>(&QComboBox::currentIndexChanged),
+            this, &DialogLineIntersect::PointNameChanged);
+    connect(ui->comboBoxP2Line1, static_cast<void (QComboBox::*)(const QString &)>(&QComboBox::currentIndexChanged),
+            this, &DialogLineIntersect::PointNameChanged);
+    connect(ui->comboBoxP1Line2, static_cast<void (QComboBox::*)(const QString &)>(&QComboBox::currentIndexChanged),
+            this, &DialogLineIntersect::PointNameChanged);
+    connect(ui->comboBoxP2Line2, static_cast<void (QComboBox::*)(const QString &)>(&QComboBox::currentIndexChanged),
+            this, &DialogLineIntersect::PointNameChanged);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -204,6 +212,49 @@ void DialogLineIntersect::P2Line2Changed(int index)
     CheckState();
 }
 
+//---------------------------------------------------------------------------------------------------------------------
+void DialogLineIntersect::PointNameChanged()
+{
+    QSet<quint32> set;
+    const quint32 p1Line1Id = getCurrentObjectId(ui->comboBoxP1Line1);
+    const quint32 p2Line1Id = getCurrentObjectId(ui->comboBoxP2Line1);
+    const quint32 p1Line2Id = getCurrentObjectId(ui->comboBoxP1Line2);
+    const quint32 p2Line2Id = getCurrentObjectId(ui->comboBoxP2Line2);
+
+    set.insert(p1Line1Id);
+    set.insert(p2Line1Id);
+    set.insert(p1Line2Id);
+    set.insert(p2Line2Id);
+
+    const VPointF *p1Line1 = data->GeometricObject<const VPointF *>(p1Line1Id);
+    const VPointF *p2Line1 = data->GeometricObject<const VPointF *>(p2Line1Id);
+    const VPointF *p1Line2 = data->GeometricObject<const VPointF *>(p1Line2Id);
+    const VPointF *p2Line2 = data->GeometricObject<const VPointF *>(p2Line2Id);
+
+    QLineF line1(p1Line1->toQPointF(), p2Line1->toQPointF());
+    QLineF line2(p1Line2->toQPointF(), p2Line2->toQPointF());
+    QPointF fPoint;
+    QLineF::IntersectType intersect = line1.intersect(line2, &fPoint);
+
+    if (set.size() < 3 || intersect == QLineF::NoIntersection)
+    {
+        flagError = false;
+        ChangeColor(ui->labelP1Line1, Qt::red);
+        ChangeColor(ui->labelP2Line1, Qt::red);
+        ChangeColor(ui->labelP1Line2, Qt::red);
+        ChangeColor(ui->labelP2Line2, Qt::red);
+    }
+    else
+    {
+        flagError = true;
+        ChangeColor(ui->labelP1Line1, QColor(76, 76, 76));
+        ChangeColor(ui->labelP2Line1, QColor(76, 76, 76));
+        ChangeColor(ui->labelP1Line2, QColor(76, 76, 76));
+        ChangeColor(ui->labelP2Line2, QColor(76, 76, 76));
+    }
+    CheckState();
+}
+
 //---------------------------------------------------------------------------------------------------------------------
 /**
  * @brief CheckState check state of dialog. Enable or disable button ok.
@@ -247,8 +298,7 @@ bool DialogLineIntersect::CheckIntersecion()
  */
 void DialogLineIntersect::setP2Line2(const quint32 &value)
 {
-    p2Line2 = value;
-    ChangeCurrentData(ui->comboBoxP2Line2, value);
+    setPointId(ui->comboBoxP2Line2, p2Line2, value, 0);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -258,8 +308,7 @@ void DialogLineIntersect::setP2Line2(const quint32 &value)
  */
 void DialogLineIntersect::setP1Line2(const quint32 &value)
 {
-    p1Line2 = value;
-    ChangeCurrentData(ui->comboBoxP1Line2, value);
+    setPointId(ui->comboBoxP1Line2, p1Line2, value, 0);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -269,8 +318,7 @@ void DialogLineIntersect::setP1Line2(const quint32 &value)
  */
 void DialogLineIntersect::setP2Line1(const quint32 &value)
 {
-    p2Line1 = value;
-    ChangeCurrentData(ui->comboBoxP2Line1, value);
+    setPointId(ui->comboBoxP2Line1, p2Line1, value, 0);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -280,8 +328,7 @@ void DialogLineIntersect::setP2Line1(const quint32 &value)
  */
 void DialogLineIntersect::setP1Line1(const quint32 &value)
 {
-    p1Line1 = value;
-    ChangeCurrentData(ui->comboBoxP1Line1, value);
+    setPointId(ui->comboBoxP1Line1, p1Line1, value, 0);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/app/dialogs/tools/dialoglineintersect.h b/src/app/dialogs/tools/dialoglineintersect.h
index 8c02428bf..518d9cca2 100644
--- a/src/app/dialogs/tools/dialoglineintersect.h
+++ b/src/app/dialogs/tools/dialoglineintersect.h
@@ -71,6 +71,7 @@ public slots:
     void                    P2Line1Changed( int index);
     void                    P1Line2Changed( int index);
     void                    P2Line2Changed( int index);
+    virtual void            PointNameChanged();
 private:
     Q_DISABLE_COPY(DialogLineIntersect)
 
diff --git a/src/app/dialogs/tools/dialoglineintersect.ui b/src/app/dialogs/tools/dialoglineintersect.ui
index bb2e1b3bd..d9e5f6653 100644
--- a/src/app/dialogs/tools/dialoglineintersect.ui
+++ b/src/app/dialogs/tools/dialoglineintersect.ui
@@ -88,7 +88,7 @@
    <item>
     <layout class="QHBoxLayout" name="horizontalLayout_3">
      <item>
-      <widget class="QLabel" name="label_3">
+      <widget class="QLabel" name="labelP1Line1">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
          <horstretch>0</horstretch>
@@ -104,7 +104,7 @@
       <widget class="QComboBox" name="comboBoxP1Line1"/>
      </item>
      <item>
-      <widget class="QLabel" name="label_5">
+      <widget class="QLabel" name="labelP2Line1">
        <property name="text">
         <string>Second point</string>
        </property>
@@ -125,7 +125,7 @@
    <item>
     <layout class="QHBoxLayout" name="horizontalLayout_5">
      <item>
-      <widget class="QLabel" name="label_6">
+      <widget class="QLabel" name="labelP1Line2">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
          <horstretch>0</horstretch>
@@ -141,7 +141,7 @@
       <widget class="QComboBox" name="comboBoxP1Line2"/>
      </item>
      <item>
-      <widget class="QLabel" name="label_7">
+      <widget class="QLabel" name="labelP2Line2">
        <property name="text">
         <string>Second point</string>
        </property>