diff --git a/source/trsedocuments/formraseditor.cpp b/source/trsedocuments/formraseditor.cpp
index b0c9b683e..4df62d90c 100644
--- a/source/trsedocuments/formraseditor.cpp
+++ b/source/trsedocuments/formraseditor.cpp
@@ -252,6 +252,7 @@ void FormRasEditor::InitDocument(WorkerThread *t, QSharedPointer<CIniFile> ini,
     ui->txtEditor->m_autoComplete = m_iniFile->getdouble("editor_autocomplete_nobug")==1;
     ui->txtEditor->m_autoIndent = m_iniFile->getdouble("editor_autocomplete")==1;
 
+    ui->btnAsm->setVisible(m_currentSourceFile.toLower().endsWith(".ras"));
 
 }
 
@@ -312,7 +313,7 @@ void FormRasEditor::Build(bool isShadow)
     if (!(QApplication::keyboardModifiers() & Qt::ShiftModifier))
         if (!isShadow)
             if (m_projectIniFile->getString("main_ras_file")!="none") {
-                if (m_projectIniFile->getString("main_ras_file")!=m_currentFileShort) {
+                    if (m_projectIniFile->getString("main_ras_file")!=m_currentFileShort) {
                     emit requestBuildMain(m_run);
                     return;
                 }
@@ -1396,3 +1397,10 @@ void FormRasEditor::on_btnViewHelp_clicked()
     Help(ui->widgetHelp->m_currentWord);
 
 }
+
+void FormRasEditor::on_btnAsm_clicked()
+{
+    LookupAssemblerUnderCursor();
+
+}
+
diff --git a/source/trsedocuments/formraseditor.h b/source/trsedocuments/formraseditor.h
index 369c2cdc7..655b2367f 100644
--- a/source/trsedocuments/formraseditor.h
+++ b/source/trsedocuments/formraseditor.h
@@ -95,7 +95,7 @@ class FormRasEditor : public TRSEDocument
     BuilderThread m_builderThread;
     QElapsedTimer m_timer;
     int m_lastBuild= 0;
-    QVector3D m_curCol = QVector3D(180,160,50);;
+    QVector3D m_curCol = QVector3D(180,160,50);
     QVector3D m_startCol = QVector3D(64,32,0);
     QVector3D m_endCol = QVector3D(255,200,100);
 
@@ -112,7 +112,6 @@ class FormRasEditor : public TRSEDocument
     void FocusOnOutput();
 
 
-    void LoadRasFile(QString fileName);
     void ExecutePrg(QString fileName);
     void InitDocument(WorkerThread *t, QSharedPointer<CIniFile> ini, QSharedPointer<CIniFile> iniProject) override;
     void setupEditor();
@@ -209,6 +208,7 @@ private slots:
     void on_chkDisplayAddresses_stateChanged(int arg1);
     void on_chkDisplayCycles_stateChanged(int arg1);
     void on_btnViewHelp_clicked();
+    void on_btnAsm_clicked();
 };
 
 #endif // FORMRASEDITOR_H
diff --git a/source/trsedocuments/formraseditor.ui b/source/trsedocuments/formraseditor.ui
index f4f0e3f49..02d1eaaff 100644
--- a/source/trsedocuments/formraseditor.ui
+++ b/source/trsedocuments/formraseditor.ui
@@ -37,6 +37,13 @@
       <layout class="QVBoxLayout" name="verticalLayout_2">
        <item>
         <layout class="QHBoxLayout" name="horizontalLayout_3">
+         <item>
+          <widget class="QPushButton" name="btnAsm">
+           <property name="text">
+            <string>View Asm (f3)</string>
+           </property>
+          </widget>
+         </item>
          <item>
           <widget class="QLabel" name="label">
            <property name="text">