diff --git a/app/gui/settings_dialog.cpp b/app/gui/settings_dialog.cpp
index a0a0f7d..0da716a 100644
--- a/app/gui/settings_dialog.cpp
+++ b/app/gui/settings_dialog.cpp
@@ -225,7 +225,7 @@ void SettingsDialog::on_use_custom_format_clicked(bool checked)
   if (!checked) updateTimeFormat();
 }
 
-void SettingsDialog::on_format_edit_textChanged(const QString& arg1)
+void SettingsDialog::on_format_edit_currentTextChanged(const QString& arg1)
 {
   bool is_multiline = arg1.contains("\\n");
   ui->layout_cfg_label->setEnabled(is_multiline);
@@ -233,7 +233,7 @@ void SettingsDialog::on_format_edit_textChanged(const QString& arg1)
   ui->layout_cfg_help_btn->setEnabled(is_multiline);
 }
 
-void SettingsDialog::on_format_edit_textEdited(const QString& arg1)
+void SettingsDialog::on_format_edit_editTextChanged(const QString& arg1)
 {
   ui->format_apply_btn->setEnabled(!arg1.isEmpty());
 }
@@ -245,7 +245,7 @@ void SettingsDialog::on_format_help_btn_clicked()
 
 void SettingsDialog::on_format_apply_btn_clicked()
 {
-  auto time_format = ui->format_edit->text();
+  auto time_format = ui->format_edit->currentText();
   applyClockOption(&GraphicsDateTimeWidget::setFormat, time_format);
   app->config().window(_curr_idx).appearance().setTimeFormat(time_format);
 }
@@ -296,7 +296,7 @@ void SettingsDialog::updateTimeFormat()
     time_format += ui->rb_ucase_apm->isChecked() ? 'A' : 'a';
   }
 
-  ui->format_edit->setText(time_format);
+  ui->format_edit->setCurrentText(time_format);
   on_format_apply_btn_clicked();
 }
 
@@ -312,6 +312,11 @@ void SettingsDialog::on_time_zone_edit_activated(int index)
   applyTimeZoneSettings();
 }
 
+void SettingsDialog::on_multi_timezone_help_btn_clicked()
+{
+  QDesktopServices::openUrl(QUrl("https://github.com/Kolcha/DigitalClock5/wiki/Multiple-timezones"));
+}
+
 void SettingsDialog::on_font_rbtn_clicked()
 {
   SectionAppearance& acfg = app->config().window(_curr_idx).appearance();
@@ -757,7 +762,7 @@ void SettingsDialog::initGeneralTab(int idx)
     ui->seconds_scale_factor_edit->setValue(acfg.getSecondsScaleFactor());
 
   ui->use_custom_format->setChecked(!standard_formats.contains(time_format));
-  ui->format_edit->setText(time_format);
+  ui->format_edit->setCurrentText(time_format);
 
   if (!ui->use_custom_format->isChecked()) {
     ui->rb_12h->setChecked(time_format.contains('h'));
diff --git a/app/gui/settings_dialog.hpp b/app/gui/settings_dialog.hpp
index 8727617..f8418b4 100644
--- a/app/gui/settings_dialog.hpp
+++ b/app/gui/settings_dialog.hpp
@@ -55,8 +55,8 @@ private slots:
   void on_seconds_scale_factor_edit_valueChanged(int arg1);
   void on_use_custom_format_toggled(bool checked);
   void on_use_custom_format_clicked(bool checked);
-  void on_format_edit_textChanged(const QString& arg1);
-  void on_format_edit_textEdited(const QString& arg1);
+  void on_format_edit_currentTextChanged(const QString& arg1);
+  void on_format_edit_editTextChanged(const QString& arg1);
   void on_format_help_btn_clicked();
   void on_format_apply_btn_clicked();
   void on_layout_cfg_edit_textEdited(const QString& arg1);
@@ -69,6 +69,7 @@ private slots:
 
   void on_use_time_zone_clicked(bool checked);
   void on_time_zone_edit_activated(int index);
+  void on_multi_timezone_help_btn_clicked();
 
   // appearance
   void on_font_rbtn_clicked();
diff --git a/app/gui/settings_dialog.ui b/app/gui/settings_dialog.ui
index a986635..57771b1 100644
--- a/app/gui/settings_dialog.ui
+++ b/app/gui/settings_dialog.ui
@@ -6,7 +6,7 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>523</width>
+    <width>505</width>
     <height>361</height>
    </rect>
   </property>
@@ -156,9 +156,42 @@
        <string>&amp;Format</string>
       </attribute>
       <layout class="QGridLayout" name="gridLayout_7">
-       <item row="1" column="0" colspan="3">
+       <item row="1" column="0" colspan="2">
         <layout class="QGridLayout" name="gridLayout_6">
-         <item row="0" column="0" colspan="3">
+         <item row="3" column="1">
+          <widget class="QLineEdit" name="custom_seps_edit">
+           <property name="maximumSize">
+            <size>
+             <width>80</width>
+             <height>16777215</height>
+            </size>
+           </property>
+           <property name="toolTip">
+            <string>replacement characters for ':' in format</string>
+           </property>
+          </widget>
+         </item>
+         <item row="1" column="2">
+          <widget class="QToolButton" name="format_help_btn">
+           <property name="icon">
+            <iconset theme="help-hint"/>
+           </property>
+           <property name="autoRaise">
+            <bool>true</bool>
+           </property>
+          </widget>
+         </item>
+         <item row="2" column="1">
+          <widget class="QLineEdit" name="layout_cfg_edit">
+           <property name="maximumSize">
+            <size>
+             <width>80</width>
+             <height>16777215</height>
+            </size>
+           </property>
+          </widget>
+         </item>
+         <item row="1" column="0">
           <layout class="QHBoxLayout" name="custom_format_layout">
            <item>
             <widget class="QCheckBox" name="use_custom_format">
@@ -171,51 +204,75 @@
             </widget>
            </item>
            <item>
-            <widget class="QLineEdit" name="format_edit"/>
-           </item>
-           <item>
-            <widget class="QToolButton" name="format_help_btn">
-             <property name="icon">
-              <iconset theme="help-hint"/>
-             </property>
-             <property name="autoRaise">
+            <widget class="QComboBox" name="format_edit">
+             <property name="editable">
               <bool>true</bool>
              </property>
-            </widget>
-           </item>
-           <item>
-            <widget class="QPushButton" name="format_apply_btn">
-             <property name="text">
-              <string>Apply</string>
-             </property>
+             <item>
+              <property name="text">
+               <string notr="true">h:mm</string>
+              </property>
+             </item>
+             <item>
+              <property name="text">
+               <string notr="true">hh:mm</string>
+              </property>
+             </item>
+             <item>
+              <property name="text">
+               <string notr="true">hh:mm:ss</string>
+              </property>
+             </item>
+             <item>
+              <property name="text">
+               <string notr="true">h:mmA</string>
+              </property>
+             </item>
+             <item>
+              <property name="text">
+               <string notr="true">hh:mmA</string>
+              </property>
+             </item>
+             <item>
+              <property name="text">
+               <string notr="true">hh:mm:ssA</string>
+              </property>
+             </item>
+             <item>
+              <property name="text">
+               <string notr="true">H:mm</string>
+              </property>
+             </item>
+             <item>
+              <property name="text">
+               <string notr="true">HH:mm</string>
+              </property>
+             </item>
+             <item>
+              <property name="text">
+               <string notr="true">HH:mm:ss</string>
+              </property>
+             </item>
+             <item>
+              <property name="text">
+               <string notr="true">hh\nmm</string>
+              </property>
+             </item>
+             <item>
+              <property name="text">
+               <string notr="true">HH\nmm</string>
+              </property>
+             </item>
+             <item>
+              <property name="text">
+               <string notr="true">hh\nmm\nA</string>
+              </property>
+             </item>
             </widget>
            </item>
           </layout>
          </item>
-         <item row="1" column="0">
-          <widget class="QLabel" name="layout_cfg_label">
-           <property name="text">
-            <string>layout &amp;config string (useful only for multiline formats)</string>
-           </property>
-           <property name="buddy">
-            <cstring>layout_cfg_edit</cstring>
-           </property>
-          </widget>
-         </item>
-         <item row="1" column="1">
-          <widget class="QLineEdit" name="layout_cfg_edit"/>
-         </item>
-         <item row="1" column="2">
-          <widget class="QToolButton" name="layout_cfg_help_btn">
-           <property name="icon">
-            <iconset theme="help-hint"/>
-           </property>
-           <property name="autoRaise">
-            <bool>true</bool>
-           </property>
-          </widget>
-         </item>
-         <item row="2" column="0">
+         <item row="3" column="0">
           <widget class="QCheckBox" name="use_custom_seps">
            <property name="text">
             <string>custom separators (will be used instead of '&amp;:')</string>
@@ -225,14 +282,7 @@
            </property>
           </widget>
          </item>
-         <item row="2" column="1">
-          <widget class="QLineEdit" name="custom_seps_edit">
-           <property name="toolTip">
-            <string>replacement characters for ':' in format</string>
-           </property>
-          </widget>
-         </item>
-         <item row="2" column="2">
+         <item row="3" column="2">
           <widget class="QToolButton" name="custom_seps_help_btn">
            <property name="icon">
             <iconset theme="help-hint"/>
@@ -242,7 +292,7 @@
            </property>
           </widget>
          </item>
-         <item row="3" column="0" colspan="3">
+         <item row="4" column="0" colspan="2">
           <layout class="QHBoxLayout" name="smaller_seconds_layout" stretch="0,0,1">
            <item>
             <widget class="QCheckBox" name="smaller_seconds">
@@ -279,12 +329,39 @@
            </item>
           </layout>
          </item>
-         <item row="4" column="0" colspan="3">
+         <item row="2" column="2">
+          <widget class="QToolButton" name="layout_cfg_help_btn">
+           <property name="icon">
+            <iconset theme="help-hint"/>
+           </property>
+           <property name="autoRaise">
+            <bool>true</bool>
+           </property>
+          </widget>
+         </item>
+         <item row="2" column="0">
+          <widget class="QLabel" name="layout_cfg_label">
+           <property name="text">
+            <string>layout &amp;config string (useful only for multiline formats)</string>
+           </property>
+           <property name="buddy">
+            <cstring>layout_cfg_edit</cstring>
+           </property>
+          </widget>
+         </item>
+         <item row="1" column="1">
+          <widget class="QPushButton" name="format_apply_btn">
+           <property name="text">
+            <string>Apply</string>
+           </property>
+          </widget>
+         </item>
+         <item row="5" column="0" colspan="2">
           <layout class="QHBoxLayout" name="time_zone_layout">
            <item>
             <widget class="QCheckBox" name="use_time_zone">
              <property name="text">
-              <string>show time in different time &amp;zone</string>
+              <string>display time in another time &amp;zone</string>
              </property>
             </widget>
            </item>
@@ -303,123 +380,140 @@
            </item>
           </layout>
          </item>
+         <item row="0" column="0" colspan="2">
+          <layout class="QHBoxLayout" name="horizontalLayout_4">
+           <item>
+            <widget class="QGroupBox" name="format_group">
+             <layout class="QGridLayout" name="gridLayout">
+              <item row="0" column="0">
+               <widget class="QRadioButton" name="rb_12h">
+                <property name="text">
+                 <string>&amp;12h</string>
+                </property>
+                <property name="checked">
+                 <bool>true</bool>
+                </property>
+               </widget>
+              </item>
+              <item row="1" column="0" colspan="3">
+               <widget class="QCheckBox" name="leading_zero">
+                <property name="text">
+                 <string>leading &amp;zero</string>
+                </property>
+               </widget>
+              </item>
+              <item row="2" column="0" colspan="3">
+               <widget class="QCheckBox" name="show_seconds">
+                <property name="text">
+                 <string>show &amp;seconds</string>
+                </property>
+                <property name="checked">
+                 <bool>true</bool>
+                </property>
+               </widget>
+              </item>
+              <item row="0" column="1">
+               <widget class="QRadioButton" name="rb_24h">
+                <property name="text">
+                 <string>&amp;24h</string>
+                </property>
+               </widget>
+              </item>
+              <item row="0" column="2">
+               <spacer name="horizontalSpacer_3">
+                <property name="orientation">
+                 <enum>Qt::Orientation::Horizontal</enum>
+                </property>
+                <property name="sizeHint" stdset="0">
+                 <size>
+                  <width>10</width>
+                  <height>20</height>
+                 </size>
+                </property>
+               </spacer>
+              </item>
+             </layout>
+            </widget>
+           </item>
+           <item>
+            <widget class="QGroupBox" name="am_pm_group">
+             <layout class="QGridLayout" name="am_pm_group_layout">
+              <item row="0" column="0" colspan="2">
+               <widget class="QCheckBox" name="show_apm">
+                <property name="text">
+                 <string>show AM&amp;/PM</string>
+                </property>
+                <property name="checked">
+                 <bool>true</bool>
+                </property>
+               </widget>
+              </item>
+              <item row="1" column="0" colspan="2">
+               <widget class="QCheckBox" name="add_space_before_apm">
+                <property name="text">
+                 <string>add space &amp;before AM/PM</string>
+                </property>
+               </widget>
+              </item>
+              <item row="2" column="0">
+               <widget class="QRadioButton" name="rb_ucase_apm">
+                <property name="text">
+                 <string>&amp;uppercase</string>
+                </property>
+                <property name="checked">
+                 <bool>true</bool>
+                </property>
+               </widget>
+              </item>
+              <item row="2" column="1">
+               <widget class="QRadioButton" name="rb_lcase_apm">
+                <property name="text">
+                 <string>&amp;lowercase</string>
+                </property>
+               </widget>
+              </item>
+             </layout>
+            </widget>
+           </item>
+          </layout>
+         </item>
+         <item row="5" column="2">
+          <widget class="QToolButton" name="multi_timezone_help_btn">
+           <property name="enabled">
+            <bool>false</bool>
+           </property>
+           <property name="icon">
+            <iconset theme="help-hint"/>
+           </property>
+           <property name="autoRaise">
+            <bool>true</bool>
+           </property>
+          </widget>
+         </item>
         </layout>
        </item>
-       <item row="0" column="1">
-        <spacer name="horizontalSpacer_4">
+       <item row="2" column="0">
+        <spacer name="verticalSpacer_2">
          <property name="orientation">
-          <enum>Qt::Orientation::Horizontal</enum>
+          <enum>Qt::Orientation::Vertical</enum>
          </property>
          <property name="sizeHint" stdset="0">
           <size>
-           <width>64</width>
-           <height>20</height>
+           <width>20</width>
+           <height>10</height>
           </size>
          </property>
         </spacer>
        </item>
-       <item row="0" column="0">
-        <widget class="QGroupBox" name="format_group">
-         <layout class="QGridLayout" name="gridLayout">
-          <item row="0" column="0">
-           <widget class="QRadioButton" name="rb_12h">
-            <property name="text">
-             <string>&amp;12h</string>
-            </property>
-            <property name="checked">
-             <bool>true</bool>
-            </property>
-           </widget>
-          </item>
-          <item row="0" column="1">
-           <widget class="QRadioButton" name="rb_24h">
-            <property name="text">
-             <string>&amp;24h</string>
-            </property>
-           </widget>
-          </item>
-          <item row="0" column="2">
-           <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>
-          <item row="1" column="0" colspan="3">
-           <widget class="QCheckBox" name="leading_zero">
-            <property name="text">
-             <string>leading &amp;zero</string>
-            </property>
-           </widget>
-          </item>
-          <item row="2" column="0" colspan="3">
-           <widget class="QCheckBox" name="show_seconds">
-            <property name="text">
-             <string>show &amp;seconds</string>
-            </property>
-            <property name="checked">
-             <bool>true</bool>
-            </property>
-           </widget>
-          </item>
-         </layout>
-        </widget>
-       </item>
-       <item row="0" column="2">
-        <widget class="QGroupBox" name="am_pm_group">
-         <layout class="QGridLayout" name="am_pm_group_layout">
-          <item row="0" column="0" colspan="2">
-           <widget class="QCheckBox" name="show_apm">
-            <property name="text">
-             <string>show AM&amp;/PM</string>
-            </property>
-            <property name="checked">
-             <bool>true</bool>
-            </property>
-           </widget>
-          </item>
-          <item row="1" column="0" colspan="2">
-           <widget class="QCheckBox" name="add_space_before_apm">
-            <property name="text">
-             <string>add space &amp;before AM/PM</string>
-            </property>
-           </widget>
-          </item>
-          <item row="2" column="0">
-           <widget class="QRadioButton" name="rb_ucase_apm">
-            <property name="text">
-             <string>&amp;uppercase</string>
-            </property>
-            <property name="checked">
-             <bool>true</bool>
-            </property>
-           </widget>
-          </item>
-          <item row="2" column="1">
-           <widget class="QRadioButton" name="rb_lcase_apm">
-            <property name="text">
-             <string>&amp;lowercase</string>
-            </property>
-           </widget>
-          </item>
-         </layout>
-        </widget>
-       </item>
-       <item row="2" column="0">
-        <spacer name="verticalSpacer_2">
+       <item row="1" column="2">
+        <spacer name="horizontalSpacer_5">
          <property name="orientation">
-          <enum>Qt::Orientation::Vertical</enum>
+          <enum>Qt::Orientation::Horizontal</enum>
          </property>
          <property name="sizeHint" stdset="0">
           <size>
-           <width>20</width>
-           <height>10</height>
+           <width>10</width>
+           <height>20</height>
           </size>
          </property>
         </spacer>
@@ -908,7 +1002,7 @@
    <slot>accept()</slot>
    <hints>
     <hint type="sourcelabel">
-     <x>512</x>
+     <x>494</x>
      <y>351</y>
     </hint>
     <hint type="destinationlabel">
@@ -924,7 +1018,7 @@
    <slot>reject()</slot>
    <hints>
     <hint type="sourcelabel">
-     <x>512</x>
+     <x>494</x>
      <y>351</y>
     </hint>
     <hint type="destinationlabel">
@@ -960,7 +1054,7 @@
      <y>167</y>
     </hint>
     <hint type="destinationlabel">
-     <x>500</x>
+     <x>482</x>
      <y>167</y>
     </hint>
    </hints>
@@ -976,7 +1070,7 @@
      <y>136</y>
     </hint>
     <hint type="destinationlabel">
-     <x>500</x>
+     <x>482</x>
      <y>141</y>
     </hint>
    </hints>
@@ -1008,7 +1102,7 @@
      <y>194</y>
     </hint>
     <hint type="destinationlabel">
-     <x>500</x>
+     <x>482</x>
      <y>194</y>
     </hint>
    </hints>
@@ -1040,7 +1134,7 @@
      <y>251</y>
     </hint>
     <hint type="destinationlabel">
-     <x>498</x>
+     <x>387</x>
      <y>252</y>
     </hint>
    </hints>
@@ -1056,7 +1150,7 @@
      <y>165</y>
     </hint>
     <hint type="destinationlabel">
-     <x>388</x>
+     <x>279</x>
      <y>165</y>
     </hint>
    </hints>
@@ -1073,7 +1167,7 @@
     </hint>
     <hint type="destinationlabel">
      <x>417</x>
-     <y>166</y>
+     <y>167</y>
     </hint>
    </hints>
   </connection>
@@ -1088,7 +1182,7 @@
      <y>165</y>
     </hint>
     <hint type="destinationlabel">
-     <x>432</x>
+     <x>323</x>
      <y>164</y>
     </hint>
    </hints>
@@ -1136,7 +1230,7 @@
      <y>125</y>
     </hint>
     <hint type="destinationlabel">
-     <x>498</x>
+     <x>387</x>
      <y>252</y>
     </hint>
    </hints>
@@ -1148,12 +1242,12 @@
    <slot>setEnabled(bool)</slot>
    <hints>
     <hint type="sourcelabel">
-     <x>490</x>
-     <y>73</y>
+     <x>377</x>
+     <y>75</y>
     </hint>
     <hint type="destinationlabel">
-     <x>490</x>
-     <y>99</y>
+     <x>377</x>
+     <y>101</y>
     </hint>
    </hints>
   </connection>
@@ -1164,12 +1258,12 @@
    <slot>setEnabled(bool)</slot>
    <hints>
     <hint type="sourcelabel">
-     <x>490</x>
-     <y>73</y>
+     <x>377</x>
+     <y>75</y>
     </hint>
     <hint type="destinationlabel">
-     <x>408</x>
-     <y>125</y>
+     <x>295</x>
+     <y>127</y>
     </hint>
    </hints>
   </connection>
@@ -1180,12 +1274,12 @@
    <slot>setEnabled(bool)</slot>
    <hints>
     <hint type="sourcelabel">
-     <x>412</x>
+     <x>330</x>
      <y>67</y>
     </hint>
     <hint type="destinationlabel">
-     <x>490</x>
-     <y>125</y>
+     <x>377</x>
+     <y>127</y>
     </hint>
    </hints>
   </connection>
@@ -1200,7 +1294,7 @@
      <y>280</y>
     </hint>
     <hint type="destinationlabel">
-     <x>498</x>
+     <x>387</x>
      <y>281</y>
     </hint>
    </hints>
@@ -1216,7 +1310,7 @@
      <y>73</y>
     </hint>
     <hint type="destinationlabel">
-     <x>466</x>
+     <x>384</x>
      <y>98</y>
     </hint>
    </hints>
@@ -1260,11 +1354,11 @@
    <slot>setValue(int)</slot>
    <hints>
     <hint type="sourcelabel">
-     <x>338</x>
+     <x>321</x>
      <y>170</y>
     </hint>
     <hint type="destinationlabel">
-     <x>281</x>
+     <x>264</x>
      <y>165</y>
     </hint>
    </hints>
@@ -1276,11 +1370,11 @@
    <slot>setValue(int)</slot>
    <hints>
     <hint type="sourcelabel">
-     <x>273</x>
+     <x>264</x>
      <y>228</y>
     </hint>
     <hint type="destinationlabel">
-     <x>338</x>
+     <x>321</x>
      <y>233</y>
     </hint>
    </hints>
@@ -1292,11 +1386,11 @@
    <slot>setValue(int)</slot>
    <hints>
     <hint type="sourcelabel">
-     <x>338</x>
+     <x>321</x>
      <y>233</y>
     </hint>
     <hint type="destinationlabel">
-     <x>273</x>
+     <x>264</x>
      <y>228</y>
     </hint>
    </hints>
@@ -1312,7 +1406,7 @@
      <y>223</y>
     </hint>
     <hint type="destinationlabel">
-     <x>470</x>
+     <x>388</x>
      <y>223</y>
     </hint>
    </hints>
@@ -1324,7 +1418,7 @@
    <slot>setValue(int)</slot>
    <hints>
     <hint type="sourcelabel">
-     <x>338</x>
+     <x>321</x>
      <y>143</y>
     </hint>
     <hint type="destinationlabel">
@@ -1344,7 +1438,7 @@
      <y>138</y>
     </hint>
     <hint type="destinationlabel">
-     <x>338</x>
+     <x>321</x>
      <y>143</y>
     </hint>
    </hints>
@@ -1356,11 +1450,11 @@
    <slot>setValue(int)</slot>
    <hints>
     <hint type="sourcelabel">
-     <x>281</x>
+     <x>264</x>
      <y>165</y>
     </hint>
     <hint type="destinationlabel">
-     <x>338</x>
+     <x>321</x>
      <y>170</y>
     </hint>
    </hints>
@@ -1381,5 +1475,37 @@
     </hint>
    </hints>
   </connection>
+  <connection>
+   <sender>use_custom_seps</sender>
+   <signal>toggled(bool)</signal>
+   <receiver>custom_seps_help_btn</receiver>
+   <slot>setEnabled(bool)</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>288</x>
+     <y>209</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>403</x>
+     <y>210</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>use_time_zone</sender>
+   <signal>toggled(bool)</signal>
+   <receiver>multi_timezone_help_btn</receiver>
+   <slot>setEnabled(bool)</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>191</x>
+     <y>266</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>405</x>
+     <y>267</y>
+    </hint>
+   </hints>
+  </connection>
  </connections>
 </ui>