diff --git a/notes b/notes
index 6defa70..b71399a 100644
--- a/notes
+++ b/notes
@@ -32,8 +32,7 @@ parameters {
 
 TODO {
     settings dialog {
-        actual window
-        menu action to open (single instance)
+        about-license info
     }
     
     ping-pong for delay
diff --git a/xybrid/fileops-config.cpp b/xybrid/fileops-config.cpp
index 1a72227..48aae2f 100644
--- a/xybrid/fileops-config.cpp
+++ b/xybrid/fileops-config.cpp
@@ -3,6 +3,7 @@
 #include "uisocket.h"
 
 #include "config/uistate.h"
+#include "config/uiconfig.h"
 
 #include <QDebug>
 
@@ -29,6 +30,11 @@ namespace FileOps = Xybrid::FileOps;
 
 using namespace Xybrid::Config;
 
+namespace { // utilities
+    inline void load(QCborValueRef m, QString& v) { v = m.toString(v); }
+    inline void load(QCborValueRef m, bool& v) { v = m.toBool(v); }
+}
+
 void FileOps::loadConfig() {
     QFile file(Config::Directories::configFile);
     if (file.open(QFile::ReadOnly)) { // file exists! read in
@@ -37,19 +43,23 @@ void FileOps::loadConfig() {
         file.close();
 
         if (auto dirs = root[qs("directories")].toMap(); !dirs.isEmpty()) {
-            if (auto s = dirs[qs("projects")].toString(); !s.isNull()) Config::Directories::projects = s;
-            if (auto s = dirs[qs("presets")].toString(); !s.isNull()) Config::Directories::presets = s;
+            load(dirs[qs("projects")], Directories::projects);
+            load(dirs[qs("presets")], Directories::presets);
+        }
+
+        if (auto ui = root[qs("ui")].toMap(); !ui.isEmpty()) {
+            load(ui[qs("verticalKnobs")], UIConfig::verticalKnobs);
         }
 
     }
 
     // make sure directories exist
-    if (auto d = QDir(Config::Directories::projects); !d.exists()) d.mkpath(".");
-    if (auto d = QDir(Config::Directories::presets); !d.exists()) d.mkpath(".");
+    if (auto d = QDir(Directories::projects); !d.exists()) d.mkpath(".");
+    if (auto d = QDir(Directories::presets); !d.exists()) d.mkpath(".");
 }
 
 void FileOps::saveConfig() {
-    QFileInfo fi(Config::Directories::configFile);
+    QFileInfo fi(Directories::configFile);
     fi.dir().mkpath("."); // make sure directory exists
 
     QFile file(fi.filePath());
@@ -60,12 +70,20 @@ void FileOps::saveConfig() {
     {
         QCborMap dirs;
 
-        dirs[qs("projects")] = Config::Directories::projects;
-        dirs[qs("presets")] = Config::Directories::presets;
+        dirs[qs("projects")] = Directories::projects;
+        dirs[qs("presets")] = Directories::presets;
 
         root[qs("directories")] = dirs;
     }
 
+    {
+        QCborMap ui;
+
+        ui[qs("verticalKnobs")] = UIConfig::verticalKnobs;
+
+        root[qs("ui")] = ui;
+    }
+
     // write out
     QCborStreamWriter w(&file);
     root.toCborValue().toCbor(w);
@@ -73,7 +91,7 @@ void FileOps::saveConfig() {
 }
 
 void FileOps::loadUIState() {
-    QFile file(Config::Directories::stateFile);
+    QFile file(Directories::stateFile);
     if (file.open(QFile::ReadOnly)) { // file exists! read in
         QCborStreamReader read(&file);
         auto root = QCborValue::fromCbor(read).toMap();
@@ -88,7 +106,7 @@ void FileOps::loadUIState() {
 }
 
 void FileOps::saveUIState() {
-    QFileInfo fi(Config::Directories::stateFile);
+    QFileInfo fi(Directories::stateFile);
     fi.dir().mkpath("."); // make sure directory exists
 
     QFile file(fi.filePath());
diff --git a/xybrid/settingsdialog.cpp b/xybrid/settingsdialog.cpp
index 478eba6..08ca0de 100644
--- a/xybrid/settingsdialog.cpp
+++ b/xybrid/settingsdialog.cpp
@@ -3,14 +3,37 @@
 
 using namespace Xybrid;
 
+#include <QDialogButtonBox>
+#include <QPushButton>
+
+#include "fileops.h"
+#include "config/uiconfig.h"
+using namespace Xybrid::Config;
+
 SettingsDialog* SettingsDialog::instance = nullptr;
 
+namespace {
+    std::vector<std::function<void()>>* bnd;
+
+    void bind(QCheckBox* o, bool& v) {
+        o->setChecked(v);
+        bnd->push_back([o, &v] {
+            v = o->isChecked();
+        });
+    }
+}
+
 SettingsDialog::SettingsDialog(QWidget *parent) :
     QDialog(parent),
     ui(new Ui::SettingsDialog) {
     ui->setupUi(this);
 
+    connect(ui->buttonBox->button(QDialogButtonBox::Apply), &QPushButton::clicked, this, &SettingsDialog::apply);
+
     instance = this;
+    bnd = &this->binds;
+
+    bind(ui->checkVerticalKnobs, UIConfig::verticalKnobs);
 }
 
 SettingsDialog::~SettingsDialog() {
@@ -18,8 +41,15 @@ SettingsDialog::~SettingsDialog() {
     delete ui;
 }
 
-void SettingsDialog::closeEvent(QCloseEvent *) {
+void SettingsDialog::apply() {
+    for (auto& f : binds) f();
+    FileOps::saveConfig();
+}
+
+void SettingsDialog::reject() {
+    QDialog::reject();
     if (instance == this) instance = nullptr;
+    deleteLater();
 }
 
 void SettingsDialog::tryOpen() {
@@ -33,3 +63,4 @@ void SettingsDialog::tryOpen() {
 }
 
 
+
diff --git a/xybrid/settingsdialog.h b/xybrid/settingsdialog.h
index 706638b..af11bc9 100644
--- a/xybrid/settingsdialog.h
+++ b/xybrid/settingsdialog.h
@@ -2,6 +2,8 @@
 
 #include <QDialog>
 
+#include <functional>
+
 namespace Ui {
     class SettingsDialog;
 }
@@ -10,16 +12,21 @@ namespace Xybrid {
     class SettingsDialog : public QDialog {
         Q_OBJECT
 
+        std::vector<std::function<void()>> binds;
+
     public:
         static SettingsDialog* instance;
 
         explicit SettingsDialog(QWidget *parent = nullptr);
         ~SettingsDialog() override;
 
-        void closeEvent(QCloseEvent*) override;
-
         static void tryOpen();
 
+    public slots:
+
+        void apply();
+        void reject() override;
+
     private:
         Ui::SettingsDialog *ui;
     };
diff --git a/xybrid/settingsdialog.ui b/xybrid/settingsdialog.ui
index 080faea..ef4724c 100644
--- a/xybrid/settingsdialog.ui
+++ b/xybrid/settingsdialog.ui
@@ -32,16 +32,59 @@
    <item>
     <widget class="QTabWidget" name="tabWidget">
      <property name="currentIndex">
-      <number>1</number>
+      <number>0</number>
      </property>
-     <widget class="QWidget" name="tab">
+     <widget class="QWidget" name="tabUI">
+      <property name="minimumSize">
+       <size>
+        <width>642</width>
+        <height>0</height>
+       </size>
+      </property>
       <attribute name="title">
-       <string>Tab 1</string>
+       <string>UI</string>
       </attribute>
+      <layout class="QVBoxLayout" name="verticalLayout_2">
+       <property name="spacing">
+        <number>4</number>
+       </property>
+       <property name="leftMargin">
+        <number>4</number>
+       </property>
+       <property name="topMargin">
+        <number>4</number>
+       </property>
+       <property name="rightMargin">
+        <number>4</number>
+       </property>
+       <property name="bottomMargin">
+        <number>4</number>
+       </property>
+       <item>
+        <widget class="QCheckBox" name="checkVerticalKnobs">
+         <property name="text">
+          <string>Knobs scroll vertically</string>
+         </property>
+        </widget>
+       </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>
+      </layout>
      </widget>
-     <widget class="QWidget" name="tab_2">
+     <widget class="QWidget" name="tabAbout">
       <attribute name="title">
-       <string>Tab 2</string>
+       <string>About</string>
       </attribute>
      </widget>
     </widget>