diff --git a/src/commandline.cpp b/src/commandline.cpp
index a235f30..71ce7bd 100644
--- a/src/commandline.cpp
+++ b/src/commandline.cpp
@@ -466,34 +466,14 @@ void EditableLCDNumber::keyPressEvent(QKeyEvent * event)
     if (event->keyCombination()
         == Preferences::Instance().getKeyShortcut(KeyShortcutTarget::SHORTCUT_CHANNELCHECK_NEXT))
     {
-        if (intValue() < MAX_DMX_ADDRESS)
-        {
-            buf = intValue() + 1;
-            display(buf);
-            emit valueChanged(buf);
-        }
-        else
-        {
-            display(1);
-            emit valueChanged(1);
-        }
+        increment();
         return;
     }
 
     if (event->keyCombination()
         == Preferences::Instance().getKeyShortcut(KeyShortcutTarget::SHORTCUT_CHANNELCHECK_PREV))
     {
-        if (intValue() - 1 > 0)
-        {
-            buf = intValue() - 1;
-            display(buf);
-            emit valueChanged(buf);
-        }
-        else
-        {
-            display(MAX_DMX_ADDRESS);
-            emit valueChanged(MAX_DMX_ADDRESS);
-        }
+        decrement();
         return;
     }
 
@@ -530,3 +510,53 @@ void EditableLCDNumber::keyPressEvent(QKeyEvent * event)
         default: break;
     }
 }
+
+void EditableLCDNumber::focusInEvent(QFocusEvent* event)
+{
+    setStyleSheet("background-color:rgb(0, 0, 0);\ncolor: rgb(255, 85, 0);");
+}
+
+void EditableLCDNumber::focusOutEvent(QFocusEvent* event)
+{
+    setStyleSheet("background-color:rgb(0, 0, 0);\ncolor: rgb(24, 24, 24);");
+}
+
+void EditableLCDNumber::increment()
+{
+    auto value = intValue();
+    if (value + m_offset <= MAX_DMX_ADDRESS)
+    {
+        value += m_offset;
+        display(value);
+        emit valueChanged(value);
+    }
+    else
+    {
+        display(1);
+        emit valueChanged(1);
+    }
+}
+
+void EditableLCDNumber::decrement()
+{
+    auto value = intValue();
+    if (value - m_offset > 0)
+    {
+        value -= m_offset;
+        display(value);
+        emit valueChanged(value);
+    }
+    else
+    {
+        display(MAX_DMX_ADDRESS);
+        emit valueChanged(MAX_DMX_ADDRESS);
+    }
+}
+
+void EditableLCDNumber::setOffset(int offset)
+{
+    if (offset > 1)
+    {
+        m_offset = offset;
+    }
+}
diff --git a/src/commandline.h b/src/commandline.h
index 0279397..8849578 100644
--- a/src/commandline.h
+++ b/src/commandline.h
@@ -140,9 +140,18 @@ class EditableLCDNumber : public QLCDNumber
     void valueChanged(int);
     void toggleOff();
 
-protected:
+public slots:
+    void increment();
+    void decrement();
+    void setOffset(int offset);
 
+protected:
     virtual void keyPressEvent(QKeyEvent * event);
+    virtual void focusInEvent(QFocusEvent* event);
+    virtual void focusOutEvent(QFocusEvent* event);
+
+private:
+    int m_offset = 1;
 };
 
 #endif // COMMANDLINE_H
diff --git a/src/ui/transmitwindow.cpp b/src/ui/transmitwindow.cpp
index 60df2c8..aa94a0c 100644
--- a/src/ui/transmitwindow.cpp
+++ b/src/ui/transmitwindow.cpp
@@ -54,7 +54,7 @@ transmitwindow::transmitwindow(int universe, QWidget * parent)
     m_slotCount = MAX_DMX_ADDRESS;
     ui->sbSlotCount->setValue(m_slotCount);
     ui->sbSlotCount->setWrapping(true);
-
+        
     ui->sbFadeRangeEnd->setMinimum(MIN_DMX_ADDRESS);
     ui->sbFadeRangeEnd->setMaximum(m_slotCount);
     ui->sbFadeRangeEnd->setValue(m_slotCount);
@@ -162,7 +162,9 @@ transmitwindow::transmitwindow(int universe, QWidget * parent)
     ui->slChannelCheck->setMinimum(0);
     ui->slChannelCheck->setMaximum(MAX_SACN_LEVEL);
     ui->slChannelCheck->setValue(MAX_SACN_LEVEL);
+
     ui->lcdNumber->display(1);
+    connect(ui->sbOffset, &QSpinBox::valueChanged, ui->lcdNumber, &EditableLCDNumber::setOffset);
 
     m_blinkTimer = new QTimer(this);
     m_blinkTimer->setInterval(BLINK_TIME);
@@ -532,40 +534,12 @@ void transmitwindow::on_cbPriorityMode_currentIndexChanged(int index)
 
 void transmitwindow::on_btnCcNext_pressed()
 {
-    int value = ui->lcdNumber->value();
-
-    if (++value > m_slotCount) value = MIN_DMX_ADDRESS;
-
-    ui->lcdNumber->display(value);
-
-    if (m_sender)
-    {
-        // Update levels.
-        m_sender->setLevelRange(MIN_DMX_ADDRESS - 1, m_slotCount - 1, 0);
-        m_sender->setLevel(value - 1, ui->slChannelCheck->value());
-
-        // Update priorities if requested.
-        updateChanCheckPap(value - 1);
-    }
+    ui->lcdNumber->increment();
 }
 
 void transmitwindow::on_btnCcPrev_pressed()
 {
-    int value = ui->lcdNumber->value();
-
-    if (--value < MIN_DMX_ADDRESS) value = m_slotCount;
-
-    ui->lcdNumber->display(value);
-
-    if (m_sender)
-    {
-        // Update levels.
-        m_sender->setLevelRange(MIN_DMX_ADDRESS - 1, m_slotCount - 1, 0);
-        m_sender->setLevel(value - 1, ui->slChannelCheck->value());
-
-        // Update priorities if requested.
-        updateChanCheckPap(value - 1);
-    }
+    ui->lcdNumber->decrement();
 }
 
 void transmitwindow::on_cbCcPap_toggled(bool checked)
@@ -577,7 +551,7 @@ void transmitwindow::on_cbCcPap_toggled(bool checked)
 
     if (checked)
     {
-        updateChanCheckPap(ui->lcdNumber->value() - 1);
+        updateChanCheckPap(ui->lcdNumber->value() - 1, ui->sbGrouping->value());
     }
     else
     {
@@ -590,11 +564,17 @@ void transmitwindow::on_lcdNumber_valueChanged(int value)
     if (m_sender)
     {
         // Update levels.
+        const auto grouping = ui->sbGrouping->value();
+        const uint16_t maxAddress = value - 1 + grouping;
+
         m_sender->setLevelRange(0, m_slotCount - 1, 0);
-        m_sender->setLevel(value - 1, ui->slChannelCheck->value());
+        for (auto channel = value - 1; channel < std::min(MAX_DMX_ADDRESS, maxAddress); channel++)
+        {
+            m_sender->setLevel(channel, ui->slChannelCheck->value());
+        }
 
         // Update priorities if requested.
-        updateChanCheckPap(value - 1);
+        updateChanCheckPap(value - 1, grouping);
     }
 }
 
@@ -672,7 +652,7 @@ void transmitwindow::on_tabWidget_currentChanged(int index)
         {
             auto address = ui->lcdNumber->value() - 1;
             m_sender->setLevel(address, ui->slChannelCheck->value());
-            updateChanCheckPap(address);
+            updateChanCheckPap(address, ui->sbGrouping->value());
 
             ui->lcdNumber->setFocus();
             break;
@@ -1008,7 +988,7 @@ void transmitwindow::on_sbMaxFPS_editingFinished()
     if (ui->sbMaxFPS->value() < ui->sbMinFPS->value()) ui->sbMaxFPS->setValue(ui->sbMinFPS->value());
 }
 
-void transmitwindow::updateChanCheckPap(int address)
+void transmitwindow::updateChanCheckPap(int address, int length)
 {
     Q_ASSERT(address < DMX_SLOT_MAX);
     if (address >= m_slotCount)
@@ -1023,7 +1003,10 @@ void transmitwindow::updateChanCheckPap(int address)
     }
 
     std::array<quint8, MAX_DMX_ADDRESS> ccPap{0};
-    ccPap[address] = m_perAddressPriorities[address];
+    for (int i = address; i < std::min(address+length, DMX_SLOT_MAX); i++)
+    {
+        ccPap[i] = m_perAddressPriorities[i];
+    }
     m_sender->setPerChannelPriorities(ccPap.data());
 }
 
diff --git a/src/ui/transmitwindow.h b/src/ui/transmitwindow.h
index aed4755..44d22aa 100644
--- a/src/ui/transmitwindow.h
+++ b/src/ui/transmitwindow.h
@@ -105,7 +105,7 @@ private slots:
     void updateTitle();
     void setLevel(int address, int value);
     void updatePerChanPriorityButton();
-    void updateChanCheckPap(int address);
+    void updateChanCheckPap(int address, int length);
     void updateFadeRangePap();
     Ui::transmitwindow * ui = nullptr;
     ConfigurePerChanPrioDlg * m_perChannelDialog = nullptr;
diff --git a/ui/transmitwindow.ui b/ui/transmitwindow.ui
index d9edcdd..038fb48 100644
--- a/ui/transmitwindow.ui
+++ b/ui/transmitwindow.ui
@@ -575,7 +575,7 @@ border-radius: 4px;
        <enum>Qt::FocusPolicy::NoFocus</enum>
       </property>
       <property name="currentIndex">
-       <number>2</number>
+       <number>1</number>
       </property>
       <widget class="QWidget" name="tabFaders">
        <attribute name="title">
@@ -1302,6 +1302,75 @@ color: rgb(255, 85, 0);</string>
           </property>
          </widget>
         </item>
+        <item>
+         <layout class="QHBoxLayout" name="horizontalLayout_10">
+          <item>
+           <widget class="QLabel" name="label_11">
+            <property name="text">
+             <string>Offset</string>
+            </property>
+           </widget>
+          </item>
+          <item>
+           <widget class="QSpinBox" name="sbOffset">
+            <property name="sizePolicy">
+             <sizepolicy hsizetype="Expanding" vsizetype="Fixed">
+              <horstretch>0</horstretch>
+              <verstretch>0</verstretch>
+             </sizepolicy>
+            </property>
+            <property name="maximumSize">
+             <size>
+              <width>100</width>
+              <height>16777215</height>
+             </size>
+            </property>
+            <property name="minimum">
+             <number>1</number>
+            </property>
+           </widget>
+          </item>
+          <item>
+           <widget class="QLabel" name="label_10">
+            <property name="text">
+             <string>Grouping</string>
+            </property>
+           </widget>
+          </item>
+          <item>
+           <widget class="QSpinBox" name="sbGrouping">
+            <property name="sizePolicy">
+             <sizepolicy hsizetype="Expanding" vsizetype="Fixed">
+              <horstretch>0</horstretch>
+              <verstretch>0</verstretch>
+             </sizepolicy>
+            </property>
+            <property name="maximumSize">
+             <size>
+              <width>100</width>
+              <height>16777215</height>
+             </size>
+            </property>
+            <property name="minimum">
+             <number>1</number>
+            </property>
+           </widget>
+          </item>
+          <item>
+           <spacer name="horizontalSpacer_3">
+            <property name="orientation">
+             <enum>Qt::Orientation::Horizontal</enum>
+            </property>
+            <property name="sizeHint" stdset="0">
+             <size>
+              <width>40</width>
+              <height>20</height>
+             </size>
+            </property>
+           </spacer>
+          </item>
+         </layout>
+        </item>
         <item>
          <layout class="QHBoxLayout" name="horizontalLayout_4">
           <item>
@@ -2001,6 +2070,27 @@ color: rgb(255, 85, 0);</string>
    <header>commandline.h</header>
   </customwidget>
  </customwidgets>
+ <tabstops>
+  <tabstop>rbPathwaySecure</tabstop>
+  <tabstop>lePathwaySecurePassword</tabstop>
+  <tabstop>sbSlotCount</tabstop>
+  <tabstop>sbMinFPS</tabstop>
+  <tabstop>sbMaxFPS</tabstop>
+  <tabstop>teCommandline</tabstop>
+  <tabstop>lcdNumber</tabstop>
+  <tabstop>sbOffset</tabstop>
+  <tabstop>sbGrouping</tabstop>
+  <tabstop>cbCcPap</tabstop>
+  <tabstop>cbFadeRangePap</tabstop>
+  <tabstop>rbChaseSnap</tabstop>
+  <tabstop>rbChaseSine</tabstop>
+  <tabstop>rbChaseRamp</tabstop>
+  <tabstop>rbVerticalBars</tabstop>
+  <tabstop>rbHorizBars</tabstop>
+  <tabstop>rbUsDate</tabstop>
+  <tabstop>leScrollText</tabstop>
+  <tabstop>rbEuDate</tabstop>
+ </tabstops>
  <resources>
   <include location="../res/resources.qrc"/>
  </resources>