diff --git a/niri-config/src/gestures.rs b/niri-config/src/gestures.rs
index 8c4b1363..dcf296ac 100644
--- a/niri-config/src/gestures.rs
+++ b/niri-config/src/gestures.rs
@@ -1,55 +1,102 @@
+use crate::utils::MergeWith;
 use crate::FloatOrInt;
 
-#[derive(knuffel::Decode, Debug, Default, Clone, Copy, PartialEq)]
+#[derive(Debug, Default, Clone, Copy, PartialEq)]
 pub struct Gestures {
-    #[knuffel(child, default)]
     pub dnd_edge_view_scroll: DndEdgeViewScroll,
-    #[knuffel(child, default)]
     pub dnd_edge_workspace_switch: DndEdgeWorkspaceSwitch,
-    #[knuffel(child, default)]
     pub hot_corners: HotCorners,
 }
 
-#[derive(knuffel::Decode, Debug, Clone, Copy, PartialEq)]
+#[derive(knuffel::Decode, Debug, Default, Clone, Copy, PartialEq)]
+pub struct GesturesPart {
+    #[knuffel(child)]
+    pub dnd_edge_view_scroll: Option<DndEdgeViewScrollPart>,
+    #[knuffel(child)]
+    pub dnd_edge_workspace_switch: Option<DndEdgeWorkspaceSwitchPart>,
+    #[knuffel(child)]
+    pub hot_corners: Option<HotCorners>,
+}
+
+impl MergeWith<GesturesPart> for Gestures {
+    fn merge_with(&mut self, part: &GesturesPart) {
+        merge!(
+            (self, part),
+            dnd_edge_view_scroll,
+            dnd_edge_workspace_switch,
+        );
+        merge_clone!((self, part), hot_corners);
+    }
+}
+
+#[derive(Debug, Clone, Copy, PartialEq)]
 pub struct DndEdgeViewScroll {
-    #[knuffel(child, unwrap(argument), default = Self::default().trigger_width)]
-    pub trigger_width: FloatOrInt<0, 65535>,
-    #[knuffel(child, unwrap(argument), default = Self::default().delay_ms)]
+    pub trigger_width: f64,
     pub delay_ms: u16,
-    #[knuffel(child, unwrap(argument), default = Self::default().max_speed)]
-    pub max_speed: FloatOrInt<0, 1_000_000>,
+    pub max_speed: f64,
 }
 
 impl Default for DndEdgeViewScroll {
     fn default() -> Self {
         Self {
-            trigger_width: FloatOrInt(30.), // Taken from GTK 4.
+            trigger_width: 30., // Taken from GTK 4.
             delay_ms: 100,
-            max_speed: FloatOrInt(1500.),
+            max_speed: 1500.,
         }
     }
 }
 
 #[derive(knuffel::Decode, Debug, Clone, Copy, PartialEq)]
+pub struct DndEdgeViewScrollPart {
+    #[knuffel(child, unwrap(argument))]
+    pub trigger_width: Option<FloatOrInt<0, 65535>>,
+    #[knuffel(child, unwrap(argument))]
+    pub delay_ms: Option<u16>,
+    #[knuffel(child, unwrap(argument))]
+    pub max_speed: Option<FloatOrInt<0, 1_000_000>>,
+}
+
+impl MergeWith<DndEdgeViewScrollPart> for DndEdgeViewScroll {
+    fn merge_with(&mut self, part: &DndEdgeViewScrollPart) {
+        merge!((self, part), trigger_width, max_speed);
+        merge_clone!((self, part), delay_ms);
+    }
+}
+
+#[derive(Debug, Clone, Copy, PartialEq)]
 pub struct DndEdgeWorkspaceSwitch {
-    #[knuffel(child, unwrap(argument), default = Self::default().trigger_height)]
-    pub trigger_height: FloatOrInt<0, 65535>,
-    #[knuffel(child, unwrap(argument), default = Self::default().delay_ms)]
+    pub trigger_height: f64,
     pub delay_ms: u16,
-    #[knuffel(child, unwrap(argument), default = Self::default().max_speed)]
-    pub max_speed: FloatOrInt<0, 1_000_000>,
+    pub max_speed: f64,
 }
 
 impl Default for DndEdgeWorkspaceSwitch {
     fn default() -> Self {
         Self {
-            trigger_height: FloatOrInt(50.),
+            trigger_height: 50.,
             delay_ms: 100,
-            max_speed: FloatOrInt(1500.),
+            max_speed: 1500.,
         }
     }
 }
 
+#[derive(knuffel::Decode, Debug, Clone, Copy, PartialEq)]
+pub struct DndEdgeWorkspaceSwitchPart {
+    #[knuffel(child, unwrap(argument))]
+    pub trigger_height: Option<FloatOrInt<0, 65535>>,
+    #[knuffel(child, unwrap(argument))]
+    pub delay_ms: Option<u16>,
+    #[knuffel(child, unwrap(argument))]
+    pub max_speed: Option<FloatOrInt<0, 1_000_000>>,
+}
+
+impl MergeWith<DndEdgeWorkspaceSwitchPart> for DndEdgeWorkspaceSwitch {
+    fn merge_with(&mut self, part: &DndEdgeWorkspaceSwitchPart) {
+        merge!((self, part), trigger_height, max_speed);
+        merge_clone!((self, part), delay_ms);
+    }
+}
+
 #[derive(knuffel::Decode, Debug, Default, Clone, Copy, PartialEq)]
 pub struct HotCorners {
     #[knuffel(child)]
diff --git a/niri-config/src/lib.rs b/niri-config/src/lib.rs
index 7a07b71b..ab63361d 100644
--- a/niri-config/src/lib.rs
+++ b/niri-config/src/lib.rs
@@ -192,7 +192,7 @@ where
                 "hotkey-overlay" => m_merge!(hotkey_overlay),
                 "config-notification" => m_merge!(config_notification),
                 "animations" => m_replace!(animations),
-                "gestures" => m_replace!(gestures),
+                "gestures" => m_merge!(gestures),
                 "overview" => m_merge!(overview),
                 "xwayland-satellite" => m_merge!(xwayland_satellite),
                 "switch-events" => m_merge!(switch_events),
@@ -1433,22 +1433,14 @@ mod tests {
             },
             gestures: Gestures {
                 dnd_edge_view_scroll: DndEdgeViewScroll {
-                    trigger_width: FloatOrInt(
-                        10.0,
-                    ),
+                    trigger_width: 10.0,
                     delay_ms: 100,
-                    max_speed: FloatOrInt(
-                        50.0,
-                    ),
+                    max_speed: 50.0,
                 },
                 dnd_edge_workspace_switch: DndEdgeWorkspaceSwitch {
-                    trigger_height: FloatOrInt(
-                        50.0,
-                    ),
+                    trigger_height: 50.0,
                     delay_ms: 100,
-                    max_speed: FloatOrInt(
-                        1500.0,
-                    ),
+                    max_speed: 1500.0,
                 },
                 hot_corners: HotCorners {
                     off: false,
diff --git a/src/layout/monitor.rs b/src/layout/monitor.rs
index 5e463a7e..8f322e9e 100644
--- a/src/layout/monitor.rs
+++ b/src/layout/monitor.rs
@@ -1904,7 +1904,7 @@ impl<W: LayoutElement> Monitor<W> {
         };
 
         let config = &self.options.gestures.dnd_edge_workspace_switch;
-        let trigger_height = config.trigger_height.0;
+        let trigger_height = config.trigger_height;
 
         // Restrict the scrolling horizontally to the strip of workspaces to avoid unwanted trigger
         // after using the hot corner or during horizontal scroll.
@@ -1958,7 +1958,7 @@ impl<W: LayoutElement> Monitor<W> {
 
         let time_delta = now.saturating_sub(last_time).as_secs_f64();
 
-        let delta = delta * time_delta * config.max_speed.0;
+        let delta = delta * time_delta * config.max_speed;
 
         gesture.tracker.push(delta, now);
 
diff --git a/src/layout/scrolling.rs b/src/layout/scrolling.rs
index 9c483e72..02541d1b 100644
--- a/src/layout/scrolling.rs
+++ b/src/layout/scrolling.rs
@@ -3045,7 +3045,7 @@ impl<W: LayoutElement> ScrollingSpace<W> {
 
         let time_delta = now.saturating_sub(last_time).as_secs_f64();
 
-        let delta = delta * time_delta * config.max_speed.0;
+        let delta = delta * time_delta * config.max_speed;
 
         gesture.tracker.push(delta, now);
 
diff --git a/src/layout/workspace.rs b/src/layout/workspace.rs
index 5bdd2624..32ce3c9e 100644
--- a/src/layout/workspace.rs
+++ b/src/layout/workspace.rs
@@ -1766,7 +1766,7 @@ impl<W: LayoutElement> Workspace<W> {
 
     pub fn dnd_scroll_gesture_scroll(&mut self, pos: Point<f64, Logical>, speed: f64) -> bool {
         let config = &self.options.gestures.dnd_edge_view_scroll;
-        let trigger_width = config.trigger_width.0;
+        let trigger_width = config.trigger_width;
 
         // This working area intentionally does not include extra struts from Options.
         let x = pos.x - self.working_area.loc.x;