diff --git a/sd/UIConfig_simpress.mk b/sd/UIConfig_simpress.mk
index aecdecff39ed..c5526412d883 100644
--- a/sd/UIConfig_simpress.mk
+++ b/sd/UIConfig_simpress.mk
@@ -149,7 +149,6 @@ $(eval $(call gb_UIConfig_add_uifiles,modules/simpress,\
 	sd/uiconfig/simpress/ui/slidecontextmenu \
 	sd/uiconfig/simpress/ui/slidedesigndialog \
 	sd/uiconfig/simpress/ui/slidetransitionspanel \
-	sd/uiconfig/simpress/ui/slidetransitionspanelhorizontal \
 	sd/uiconfig/simpress/ui/tabledesignpanel \
 	sd/uiconfig/simpress/ui/templatedialog \
 ))
diff --git a/sd/source/ui/animations/SlideTransitionPane.cxx b/sd/source/ui/animations/SlideTransitionPane.cxx
index 18da6d42a124..abe300766881 100644
--- a/sd/source/ui/animations/SlideTransitionPane.cxx
+++ b/sd/source/ui/animations/SlideTransitionPane.cxx
@@ -405,26 +405,6 @@ SlideTransitionPane::SlideTransitionPane(
         mbHasSelection( false ),
         mbUpdatingControls( false ),
         mbIsMainViewChangePending( false ),
-        mbHorizontalLayout( false ),
-        maLateInitTimer()
-{
-    Initialize(pDoc);
-}
-
-SlideTransitionPane::SlideTransitionPane(
-    Window * pParent,
-    ViewShellBase & rBase,
-    SdDrawDocument* pDoc,
-    const css::uno::Reference<css::frame::XFrame>& rxFrame,
-    bool /*bHorizontalLayout*/ ) :
-        PanelLayout( pParent, "SlideTransitionsPanel", "modules/simpress/ui/slidetransitionspanelhorizontal.ui", rxFrame, true ),
-
-        mrBase( rBase ),
-        mpDrawDoc( pDoc ),
-        mbHasSelection( false ),
-        mbUpdatingControls( false ),
-        mbIsMainViewChangePending( false ),
-        mbHorizontalLayout( true ),
         maLateInitTimer()
 {
     Initialize(pDoc);
@@ -535,10 +515,7 @@ void SlideTransitionPane::DataChanged (const DataChangedEvent&)
 
 void SlideTransitionPane::UpdateLook()
 {
-    if( mbHorizontalLayout )
-        SetBackground(Wallpaper());
-    else
-        SetBackground(::sfx2::sidebar::Theme::GetWallpaper(::sfx2::sidebar::Theme::Paint_PanelBackground));
+    SetBackground(::sfx2::sidebar::Theme::GetWallpaper(::sfx2::sidebar::Theme::Paint_PanelBackground));
 }
 
 void SlideTransitionPane::onSelectionChanged()
diff --git a/sd/source/ui/inc/SlideTransitionPane.hxx b/sd/source/ui/inc/SlideTransitionPane.hxx
index 7b0d52a9cff3..1b506b39bb48 100644
--- a/sd/source/ui/inc/SlideTransitionPane.hxx
+++ b/sd/source/ui/inc/SlideTransitionPane.hxx
@@ -53,12 +53,6 @@ public:
         ViewShellBase & rBase,
         SdDrawDocument* pDoc,
         const css::uno::Reference<css::frame::XFrame>& rxFrame );
-    explicit SlideTransitionPane(
-        Window * pParent,
-        ViewShellBase & rBase,
-        SdDrawDocument* pDoc,
-        const css::uno::Reference<css::frame::XFrame>& rxFrame,
-        bool bHorizontalLayout );
     virtual ~SlideTransitionPane() override;
     virtual void dispose() override;
 
@@ -130,7 +124,6 @@ private:
     bool         mbHasSelection;
     bool         mbUpdatingControls;
     bool         mbIsMainViewChangePending;
-    bool const   mbHorizontalLayout;
 
     std::vector<OUString>  maSoundList;
     mutable OUString maCurrentSoundFile;
diff --git a/sd/uiconfig/simpress/ui/slidetransitionspanelhorizontal.ui b/sd/uiconfig/simpress/ui/slidetransitionspanelhorizontal.ui
deleted file mode 100644
index fbf0c161fd75..000000000000
--- a/sd/uiconfig/simpress/ui/slidetransitionspanelhorizontal.ui
+++ /dev/null
@@ -1,264 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!-- Generated with glade 3.18.3 -->
-<interface domain="sd">
-  <requires lib="gtk+" version="3.18"/>
-  <object class="GtkBox" id="SlideTransitionsPanel">
-    <property name="visible">True</property>
-    <property name="can_focus">False</property>
-    <property name="hexpand">True</property>
-    <property name="orientation">vertical</property>
-    <child>
-      <object class="GtkBox" id="box1">
-        <property name="visible">True</property>
-        <property name="can_focus">False</property>
-        <property name="hexpand">True</property>
-        <property name="spacing">12</property>
-        <child>
-          <object class="GtkBox" id="box4">
-            <property name="visible">True</property>
-            <property name="can_focus">False</property>
-            <child>
-              <object class="GtkAlignment" id="transitions_icons">
-                <property name="width_request">500</property>
-                <property name="height_request">75</property>
-                <property name="visible">True</property>
-                <property name="can_focus">False</property>
-                <property name="hexpand">True</property>
-                <child>
-                  <placeholder/>
-                </child>
-              </object>
-              <packing>
-                <property name="expand">False</property>
-                <property name="fill">True</property>
-                <property name="position">0</property>
-              </packing>
-            </child>
-          </object>
-          <packing>
-            <property name="expand">False</property>
-            <property name="fill">True</property>
-            <property name="position">0</property>
-          </packing>
-        </child>
-        <child>
-          <object class="GtkGrid" id="grid2">
-            <property name="visible">True</property>
-            <property name="can_focus">False</property>
-            <property name="column_spacing">12</property>
-            <property name="valign">center</property>
-            <child>
-              <object class="GtkLabel" id="duration_label">
-                <property name="visible">True</property>
-                <property name="can_focus">False</property>
-                <property name="halign">end</property>
-                <property name="label" translatable="yes" context="slidetransitionspanelhorizontal|duration_label">Duration:</property>
-                <property name="xalign">0</property>
-              </object>
-              <packing>
-                <property name="left_attach">0</property>
-                <property name="top_attach">1</property>
-              </packing>
-            </child>
-            <child>
-              <object class="VclComboBoxNumeric" id="transition_duration:0.00sec">
-                <property name="visible">True</property>
-                <property name="can_focus">False</property>
-                <property name="has_tooltip">True</property>
-                <property name="tooltip_text" translatable="yes" context="slidetransitionspanelhorizontal|transition_duration|tooltip_text">Select the speed of Slide Transition.</property>
-                <property name="hexpand">True</property>
-              </object>
-              <packing>
-                <property name="left_attach">1</property>
-                <property name="top_attach">1</property>
-              </packing>
-            </child>
-            <child>
-              <object class="GtkLabel" id="variant_label">
-                <property name="visible">True</property>
-                <property name="can_focus">False</property>
-                <property name="label" translatable="yes" context="slidetransitionspanelhorizontal|variant_label">Variant:</property>
-              </object>
-              <packing>
-                <property name="left_attach">0</property>
-                <property name="top_attach">0</property>
-              </packing>
-            </child>
-            <child>
-              <object class="GtkComboBox" id="variant_list">
-                <property name="visible">True</property>
-                <property name="can_focus">False</property>
-              </object>
-              <packing>
-                <property name="left_attach">1</property>
-                <property name="top_attach">0</property>
-              </packing>
-            </child>
-            <child>
-              <object class="GtkLabel" id="sound_label">
-                <property name="visible">True</property>
-                <property name="can_focus">False</property>
-                <property name="halign">end</property>
-                <property name="label" translatable="yes" context="slidetransitionspanelhorizontal|sound_label">Sound:</property>
-              </object>
-              <packing>
-                <property name="left_attach">2</property>
-                <property name="top_attach">0</property>
-              </packing>
-            </child>
-            <child>
-              <object class="GtkComboBoxText" id="sound_list">
-                <property name="visible">True</property>
-                <property name="can_focus">False</property>
-                <property name="hexpand">True</property>
-                <items>
-                  <item translatable="yes" context="slidetransitionspanelhorizontal|sound_list">No sound</item>
-                  <item translatable="yes" context="slidetransitionspanelhorizontal|sound_list">Stop previous sound</item>
-                  <item translatable="yes" context="slidetransitionspanelhorizontal|sound_list">Other sound...</item>
-                </items>
-              </object>
-              <packing>
-                <property name="left_attach">3</property>
-                <property name="top_attach">0</property>
-              </packing>
-            </child>
-            <child>
-              <object class="GtkCheckButton" id="loop_sound">
-                <property name="label" translatable="yes" context="slidetransitionspanelhorizontal|loop_sound">Loop until next sound</property>
-                <property name="visible">True</property>
-                <property name="can_focus">True</property>
-                <property name="receives_default">False</property>
-                <property name="use_underline">True</property>
-                <property name="xalign">0</property>
-                <property name="draw_indicator">True</property>
-              </object>
-              <packing>
-                <property name="left_attach">3</property>
-                <property name="top_attach">1</property>
-              </packing>
-            </child>
-            <child>
-              <object class="GtkRadioButton" id="rb_mouse_click">
-                <property name="label" translatable="yes" context="slidetransitionspanelhorizontal|rb_mouse_click">On mouse click</property>
-                <property name="visible">True</property>
-                <property name="can_focus">True</property>
-                <property name="receives_default">False</property>
-                <property name="use_underline">True</property>
-                <property name="xalign">0</property>
-                <property name="active">True</property>
-                <property name="draw_indicator">True</property>
-                <property name="group">rb_auto_after</property>
-              </object>
-              <packing>
-                <property name="left_attach">4</property>
-                <property name="top_attach">0</property>
-                <property name="width">2</property>
-              </packing>
-            </child>
-            <child>
-              <object class="GtkRadioButton" id="rb_auto_after">
-                <property name="label" translatable="yes" context="slidetransitionspanelhorizontal|rb_auto_after">Automatically after:</property>
-                <property name="visible">True</property>
-                <property name="can_focus">True</property>
-                <property name="receives_default">False</property>
-                <property name="use_underline">True</property>
-                <property name="xalign">0</property>
-                <property name="active">True</property>
-                <property name="draw_indicator">True</property>
-              </object>
-              <packing>
-                <property name="left_attach">4</property>
-                <property name="top_attach">1</property>
-              </packing>
-            </child>
-            <child>
-              <object class="GtkSpinButton" id="auto_after_value:0sec">
-                <property name="visible">True</property>
-                <property name="can_focus">True</property>
-                <property name="digits">2</property>
-              </object>
-              <packing>
-                <property name="left_attach">5</property>
-                <property name="top_attach">1</property>
-              </packing>
-            </child>
-            <child>
-              <object class="GtkCheckButton" id="auto_preview">
-                <property name="label" translatable="yes" context="slidetransitionspanelhorizontal|auto_preview">Automatic Preview</property>
-                <property name="visible">True</property>
-                <property name="can_focus">True</property>
-                <property name="receives_default">False</property>
-                <property name="use_underline">True</property>
-                <property name="xalign">0</property>
-                <property name="draw_indicator">True</property>
-              </object>
-              <packing>
-                <property name="left_attach">6</property>
-                <property name="top_attach">1</property>
-              </packing>
-            </child>
-            <child>
-              <object class="GtkButtonBox" id="buttonbox1">
-                <property name="visible">True</property>
-                <property name="can_focus">False</property>
-                <property name="layout_style">center</property>
-                <child>
-                  <object class="GtkButton" id="apply_to_all">
-                    <property name="label" translatable="yes" context="slidetransitionspanelhorizontal|apply_to_all">Apply Transition to All Slides</property>
-                    <property name="visible">True</property>
-                    <property name="can_focus">True</property>
-                    <property name="receives_default">True</property>
-                    <property name="halign">center</property>
-                  </object>
-                  <packing>
-                    <property name="expand">False</property>
-                    <property name="fill">True</property>
-                    <property name="position">0</property>
-                  </packing>
-                </child>
-              </object>
-              <packing>
-                <property name="left_attach">6</property>
-                <property name="top_attach">0</property>
-                <property name="width">2</property>
-              </packing>
-            </child>
-            <child>
-              <object class="GtkButton" id="play">
-                <property name="label" translatable="yes" context="slidetransitionspanelhorizontal|play">Play</property>
-                <property name="visible">True</property>
-                <property name="can_focus">True</property>
-                <property name="receives_default">True</property>
-                <property name="image">image1</property>
-                <property name="image_position">right</property>
-                <property name="always_show_image">True</property>
-              </object>
-              <packing>
-                <property name="left_attach">7</property>
-                <property name="top_attach">1</property>
-              </packing>
-            </child>
-            <child>
-              <placeholder/>
-            </child>
-          </object>
-          <packing>
-            <property name="expand">False</property>
-            <property name="fill">True</property>
-            <property name="position">1</property>
-          </packing>
-        </child>
-      </object>
-      <packing>
-        <property name="expand">True</property>
-        <property name="fill">True</property>
-        <property name="position">0</property>
-      </packing>
-    </child>
-  </object>
-  <object class="GtkImage" id="image1">
-    <property name="visible">True</property>
-    <property name="can_focus">False</property>
-    <property name="pixbuf">sd/res/playblue_16.png</property>
-  </object>
-</interface>
diff --git a/solenv/sanitizers/ui/modules/simpress.suppr b/solenv/sanitizers/ui/modules/simpress.suppr
index 22b2c753ffc2..0198d032789d 100644
--- a/solenv/sanitizers/ui/modules/simpress.suppr
+++ b/solenv/sanitizers/ui/modules/simpress.suppr
@@ -36,9 +36,3 @@ sd/uiconfig/simpress/ui/sidebarslidebackground.ui://GtkLabel[@id='masterlabel']
 sd/uiconfig/simpress/ui/sidebarslidebackground.ui://svxlo-SvxFillAttrBox[@id='fillattr1'] no-labelled-by
 sd/uiconfig/simpress/ui/sidebarslidebackground.ui://svxcorelo-SvxColorListBox[@id='fillattr2'] no-labelled-by
 sd/uiconfig/simpress/ui/sidebarslidebackground.ui://GtkLabel[@id='customlabel'] orphan-label
-sd/uiconfig/simpress/ui/slidetransitionspanelhorizontal.ui://GtkLabel[@id='duration_label'] orphan-label
-sd/uiconfig/simpress/ui/slidetransitionspanelhorizontal.ui://GtkLabel[@id='variant_label'] orphan-label
-sd/uiconfig/simpress/ui/slidetransitionspanelhorizontal.ui://GtkComboBox[@id='variant_list'] no-labelled-by
-sd/uiconfig/simpress/ui/slidetransitionspanelhorizontal.ui://GtkLabel[@id='sound_label'] orphan-label
-sd/uiconfig/simpress/ui/slidetransitionspanelhorizontal.ui://GtkComboBoxText[@id='sound_list'] no-labelled-by
-sd/uiconfig/simpress/ui/slidetransitionspanelhorizontal.ui://GtkSpinButton[@id='auto_after_value:0sec'] no-labelled-by