diff --git a/logbook/adif.cpp b/logbook/adif.cpp
index ba46ef5..f780675 100644
--- a/logbook/adif.cpp
+++ b/logbook/adif.cpp
@@ -5,6 +5,164 @@
 #include <QDateTime>
 #include <QDebug>
 
+const QStringList ADIF_FIELDS = {
+    // ADIF 3.1.0 - pulled from http://www.adif.org/310/adx310.xsd on 2019-06-04
+    "USERDEF",
+    "APP",
+    "ADDRESS",
+    "ADDRESS_INTL",
+    "AGE",
+    "A_INDEX",
+    "ANT_AZ",
+    "ANT_EL",
+    "ANT_PATH",
+    "ARRL_SECT",
+    "AWARD_SUBMITTED",
+    "AWARD_GRANTED",
+    "BAND",
+    "BAND_RX",
+    "CALL",
+    "CHECK",
+    "CLASS",
+    "CLUBLOG_QSO_UPLOAD_DATE",
+    "CLUBLOG_QSO_UPLOAD_STATUS",
+    "CNTY",
+    "COMMENT",
+    "COMMENT_INTL",
+    "CONT",
+    "CONTACTED_OP",
+    "CONTEST_ID",
+    "COUNTRY",
+    "COUNTRY_INTL",
+    "CQZ",
+    "CREDIT_SUBMITTED",
+    "CREDIT_GRANTED",
+    "DARC_DOK",
+    "DISTANCE",
+    "DXCC",
+    "EMAIL",
+    "EQ_CALL",
+    "EQSL_QSLRDATE",
+    "EQSL_QSLSDATE",
+    "EQSL_QSL_RCVD",
+    "EQSL_QSL_SENT",
+    "FISTS",
+    "FISTS_CC",
+    "FORCE_INIT",
+    "FREQ",
+    "FREQ_RX",
+    "GRIDSQUARE",
+    "GUEST_OP",
+    "HRDLOG_QSO_UPLOAD_DATE",
+    "HRDLOG_QSO_UPLOAD_STATUS",
+    "IOTA",
+    "IOTA_ISLAND_ID",
+    "ITUZ",
+    "K_INDEX",
+    "LAT",
+    "LON",
+    "LOTW_QSLRDATE",
+    "LOTW_QSLSDATE",
+    "LOTW_QSL_RCVD",
+    "LOTW_QSL_SENT",
+    "MAX_BURSTS",
+    "MODE",
+    "MS_SHOWER",
+    "MY_ANTENNA",
+    "MY_ANTENNA_INTL",
+    "MY_CITY",
+    "MY_CITY_INTL",
+    "MY_CNTY",
+    "MY_COUNTRY",
+    "MY_COUNTRY_INTL",
+    "MY_CQ_ZONE",
+    "MY_DXCC",
+    "MY_FISTS",
+    "MY_GRIDSQUARE",
+    "MY_IOTA",
+    "MY_IOTA_ISLAND_ID",
+    "MY_ITU_ZONE",
+    "MY_LAT",
+    "MY_LON",
+    "MY_NAME",
+    "MY_NAME_INTL",
+    "MY_POSTAL_CODE",
+    "MY_POSTAL_CODE_INTL",
+    "MY_RIG",
+    "MY_RIG_INTL",
+    "MY_SIG",
+    "MY_SIG_INTL",
+    "MY_SIG_INFO",
+    "MY_SIG_INFO_INTL",
+    "MY_SOTA_REF",
+    "MY_STATE",
+    "MY_STREET",
+    "MY_STREET_INTL",
+    "MY_USACA_COUNTIES",
+    "MY_VUCC_GRIDS",
+    "NAME",
+    "NAME_INTL",
+    "NOTES",
+    "NOTES_INTL",
+    "NR_BURSTS",
+    "NR_PINGS",
+    "OPERATOR",
+    "OWNER_CALLSIGN",
+    "PFX",
+    "PRECEDENCE",
+    "PROP_MODE",
+    "PUBLIC_KEY",
+    "QRZCOM_QSO_UPLOAD_DATE",
+    "QRZCOM_QSO_UPLOAD_STATUS",
+    "QSLMSG",
+    "QSLMSG_INTL",
+    "QSLRDATE",
+    "QSLSDATE",
+    "QSL_RCVD",
+    "QSL_RCVD_VIA",
+    "QSL_SENT",
+    "QSL_SENT_VIA",
+    "QSL_VIA",
+    "QSO_COMPLETE",
+    "QSO_DATE",
+    "QSO_DATE_OFF",
+    "QSO_RANDOM",
+    "QTH",
+    "QTH_INTL",
+    "REGION",
+    "RIG",
+    "RIG_INTL",
+    "RST_RCVD",
+    "RST_SENT",
+    "RX_PWR",
+    "SAT_MODE",
+    "SAT_NAME",
+    "SFI",
+    "SIG",
+    "SIG_INTL",
+    "SIG_INFO",
+    "SIG_INFO_INTL",
+    "SILENT_KEY",
+    "SKCC",
+    "SOTA_REF",
+    "SRX",
+    "SRX_STRING",
+    "STATE",
+    "STATION_CALLSIGN",
+    "STX",
+    "STX_STRING",
+    "SUBMODE",
+    "SWL",
+    "TEN_TEN",
+    "TIME_OFF",
+    "TIME_ON",
+    "TX_PWR",
+    "UKSMG",
+    "USACA_COUNTIES",
+    "VUCC_GRIDS",
+    "WEB",
+};
+
 /*
 <CALL:4>W1XT<BAND:3>20m<FREQ:6>14.076<GRIDSQUARE:4>DM33<MODE:4>JT65<RST_RCVD:3>-21<RST_SENT:3>-14<QSO_DATE:8>20110422<TIME_ON:6>041712<TIME_OFF:6>042435<TX_PWR:1>4<COMMENT:34>1st JT65A QSO.   Him: mag loop 20W<STATION_CALLSIGN:6>VK3ACF<MY_GRIDSQUARE:6>qf22lb<eor>
 <CALL:6>IK1SOW<BAND:3>20m<FREQ:6>14.076<GRIDSQUARE:4>JN35<MODE:4>JT65<RST_RCVD:3>-19<RST_SENT:3>-11<QSO_DATE:8>20110422<TIME_ON:6>052501<TIME_OFF:6>053359<TX_PWR:1>3<STATION_CALLSIGN:6>VK3ACF<MY_GRIDSQUARE:6>qf22lb<eor>
diff --git a/logbook/adif.h b/logbook/adif.h
index 74539e1..18eafe4 100644
--- a/logbook/adif.h
+++ b/logbook/adif.h
@@ -11,6 +11,7 @@
 #if defined (QT5)
 #include <QList>
 #include <QString>
+#include <QStringList>
 #include <QMultiHash>
 #else
 #include <QtGui>
@@ -18,6 +19,8 @@
 
 class QDateTime;
 
+extern const QStringList ADIF_FIELDS;
+
 class ADIF
 {
 	public:
@@ -35,18 +38,17 @@ class ADIF
         // open ADIF file and append the QSO details. Return true on success
 	bool addQSOToFile(QByteArray const& ADIF_record);
 
-  QByteArray QSOToADIF(QString const& hisCall, QString const& hisGrid, QString const& mode, QString const& submode, QString const& rptSent
+    QByteArray QSOToADIF(QString const& hisCall, QString const& hisGrid, QString const& mode, QString const& submode, QString const& rptSent
                                              , QString const& rptRcvd, QDateTime const& dateTimeOn, QDateTime const& dateTimeOff
                                              , QString const& band, QString const& comments, QString const& name
                                              , QString const& strDialFreq, QString const& m_myCall, QString const& m_myGrid
                                              , QString const& operator_call);
 
 
-
-		struct QSO
-		{
-          QString call,band,mode,submode,date,name,comment;
-		};		  
+    struct QSO
+    {
+      QString call,band,mode,submode,date,name,comment;
+    };
 
     private:
 		QMultiHash<QString, QSO> _data;
diff --git a/logqso.cpp b/logqso.cpp
index ae36879..9dd09ff 100644
--- a/logqso.cpp
+++ b/logqso.cpp
@@ -26,7 +26,6 @@ LogQSO::LogQSO(QString const& programTitle, QSettings * settings
 {
   ui->setupUi(this);
   setWindowTitle(programTitle + " - Log QSO");
-  loadSettings ();
   ui->grid->setValidator (new MaidenheadLocatorValidator {this});
 }
 
@@ -65,12 +64,61 @@ void LogQSO::on_end_now_button_pressed(){
   ui->end_date_time->setDateTime(DriftingDateTime::currentDateTimeUtc());
 }
 
+void LogQSO::on_add_new_field_button_pressed(){
+    createAdditionalField();
+}
+
+void LogQSO::createAdditionalField(QString key, QString value){
+    QLineEdit * l = new QLineEdit(this);
+    if(!value.isEmpty()){
+        l->setText(value);
+    }
+
+    QComboBox * c = new QComboBox(this);
+    c->insertItem(0, "");
+    c->insertItems(0, ADIF_FIELDS);
+    c->setEditable(false);
+    connect(c, &QComboBox::currentTextChanged, this, [this, l](const QString &text){
+       l->setProperty("fieldKey", QVariant(text));
+    });
+    if(!key.isEmpty()){
+        c->setCurrentText(key);
+    }
+
+    auto layout = static_cast<QFormLayout*>(ui->additionalFields->layout());
+    layout->removeItem(ui->field_button_layout);
+    layout->addRow(c, l);
+    layout->addItem(ui->field_button_layout);
+    m_additionalFieldsControls.append(l);
+}
+
+void LogQSO::resetAdditionalFields(){
+    if(m_additionalFieldsControls.isEmpty()){
+        return;
+    }
+
+    auto layout = static_cast<QFormLayout*>(ui->additionalFields->layout());
+    layout->removeItem(ui->field_button_layout);
+    for(int i = 0, count = layout->rowCount(); i < count; i++){
+        layout->removeRow(0);
+    }
+    layout->addItem(ui->field_button_layout);
+    m_additionalFieldsControls.clear();
+}
+
 void LogQSO::loadSettings ()
 {
   m_settings->beginGroup ("LogQSO");
   restoreGeometry (m_settings->value ("geometry", saveGeometry ()).toByteArray ());
   ui->cbComments->setChecked (m_settings->value ("SaveComments", false).toBool ());
   m_comments = m_settings->value ("LogComments", "").toString();
+
+  resetAdditionalFields();
+  auto additionalFields = QSet<QString>::fromList(m_settings->value("AdditionalFields", {}).toStringList());
+  foreach(auto key, additionalFields){
+      createAdditionalField(key);
+  }
+
   m_settings->endGroup ();
 }
 
@@ -80,6 +128,13 @@ void LogQSO::storeSettings () const
   m_settings->setValue ("geometry", saveGeometry ());
   m_settings->setValue ("SaveComments", ui->cbComments->isChecked ());
   m_settings->setValue ("LogComments", m_comments);
+
+  auto additionalFields = QStringList{};
+  foreach(auto field, m_additionalFieldsControls){
+      additionalFields.append(field->property("fieldKey").toString());
+  }
+  m_settings->setValue ("AdditionalFields", additionalFields);
+
   m_settings->endGroup ();
 }
 
@@ -90,32 +145,43 @@ void LogQSO::initLogQSO(QString const& hisCall, QString const& hisGrid, QString
                         bool toDATA, bool dBtoComments, bool bFox, QString const& opCall, QString const& comments)
 {
   if(!isHidden()) return;
+
+  loadSettings();
+
   ui->call->setFocus();
   ui->call->setText(hisCall);
   ui->grid->setText(hisGrid);
   ui->name->setText("");
   ui->comments->setText("");
+
   if (ui->cbComments->isChecked ()) ui->comments->setText(m_comments);
+
   if(dBtoComments) {
     QString t=mode;
     if(rptSent!="") t+="  Sent: " + rptSent;
     if(rptRcvd!="") t+="  Rcvd: " + rptRcvd;
     ui->comments->setText(t);
   }
+
   if(!comments.isEmpty()){
     ui->comments->setText(comments);
   }
+
   if(toDATA) mode="DATA";
+
   ui->mode->setText(mode);
   ui->sent->setText(rptSent);
   ui->rcvd->setText(rptRcvd);
   ui->start_date_time->setDateTime (dateTimeOn);
   ui->end_date_time->setDateTime (dateTimeOff);
+
   m_dialFreq=dialFreq;
   m_myCall=myCall;
   m_myGrid=myGrid;
+
   ui->band->setText (m_config->bands ()->find (dialFreq));
   ui->loggedOperator->setText(opCall);
+
   if(bFox) {
     accept();
   } else {
diff --git a/logqso.h b/logqso.h
index c3d0348..3b6e9bc 100644
--- a/logqso.h
+++ b/logqso.h
@@ -51,6 +51,9 @@ protected:
   void hideEvent (QHideEvent *);
 
 private slots:
+  void createAdditionalField(QString key={}, QString value={});
+  void resetAdditionalFields();
+  void on_add_new_field_button_pressed();
   void on_start_now_button_pressed();
   void on_end_now_button_pressed();
 
@@ -67,6 +70,7 @@ private:
   QString m_myGrid;
   QDateTime m_dateTimeOn;
   QDateTime m_dateTimeOff;
+  QList<QLineEdit*> m_additionalFieldsControls;
 };
 
 #endif // LogQSO_H
diff --git a/logqso.ui b/logqso.ui
index 4c4bc40..2b1f3f2 100644
--- a/logqso.ui
+++ b/logqso.ui
@@ -42,8 +42,8 @@
        <rect>
         <x>0</x>
         <y>0</y>
-        <width>582</width>
-        <height>401</height>
+        <width>568</width>
+        <height>442</height>
        </rect>
       </property>
       <layout class="QVBoxLayout" name="verticalLayout">
@@ -54,7 +54,7 @@
         <number>0</number>
        </property>
        <property name="rightMargin">
-        <number>0</number>
+        <number>9</number>
        </property>
        <property name="bottomMargin">
         <number>0</number>
@@ -434,7 +434,7 @@
            </property>
           </widget>
          </item>
-         <item row="8" column="0">
+         <item row="9" column="0">
           <widget class="QLabel" name="lab9">
            <property name="enabled">
             <bool>true</bool>
@@ -452,7 +452,7 @@
            </property>
           </widget>
          </item>
-         <item row="8" column="1">
+         <item row="9" column="1">
           <widget class="QLineEdit" name="name">
            <property name="enabled">
             <bool>true</bool>
@@ -465,7 +465,7 @@
            </property>
           </widget>
          </item>
-         <item row="9" column="0">
+         <item row="10" column="0">
           <widget class="QLabel" name="lab10">
            <property name="enabled">
             <bool>true</bool>
@@ -480,14 +480,14 @@
            </property>
           </widget>
          </item>
-         <item row="9" column="1">
+         <item row="10" column="1">
           <widget class="QLineEdit" name="comments">
            <property name="enabled">
             <bool>true</bool>
            </property>
           </widget>
          </item>
-         <item row="10" column="1">
+         <item row="11" column="1">
           <widget class="QCheckBox" name="cbComments">
            <property name="text">
             <string>Retain Comments</string>
@@ -496,6 +496,55 @@
          </item>
         </layout>
        </item>
+       <item>
+        <spacer name="verticalSpacer">
+         <property name="orientation">
+          <enum>Qt::Vertical</enum>
+         </property>
+         <property name="sizeHint" stdset="0">
+          <size>
+           <width>20</width>
+           <height>40</height>
+          </size>
+         </property>
+        </spacer>
+       </item>
+       <item>
+        <widget class="QGroupBox" name="additionalFields">
+         <property name="title">
+          <string>Additional Fields</string>
+         </property>
+         <layout class="QFormLayout" name="formLayout_2">
+          <item row="0" column="1">
+           <layout class="QHBoxLayout" name="field_button_layout">
+            <property name="topMargin">
+             <number>0</number>
+            </property>
+            <item>
+             <spacer name="horizontalSpacer_5">
+              <property name="orientation">
+               <enum>Qt::Horizontal</enum>
+              </property>
+              <property name="sizeHint" stdset="0">
+               <size>
+                <width>40</width>
+                <height>20</height>
+               </size>
+              </property>
+             </spacer>
+            </item>
+            <item>
+             <widget class="QPushButton" name="add_new_field_button">
+              <property name="text">
+               <string>Add New Field</string>
+              </property>
+             </widget>
+            </item>
+           </layout>
+          </item>
+         </layout>
+        </widget>
+       </item>
       </layout>
      </widget>
     </widget>