diff --git a/src/apprt/gtk-ng/class/application.zig b/src/apprt/gtk-ng/class/application.zig
index 226d7c56b..523a98033 100644
--- a/src/apprt/gtk-ng/class/application.zig
+++ b/src/apprt/gtk-ng/class/application.zig
@@ -562,6 +562,8 @@ pub const Application = extern struct {
 
             .move_tab => return Action.moveTab(target, value),
 
+            .new_split => return Action.newSplit(target, value),
+
             .new_tab => return Action.newTab(target),
 
             .new_window => try Action.newWindow(
@@ -611,7 +613,6 @@ pub const Application = extern struct {
             .prompt_title,
             .inspector,
             // TODO: splits
-            .new_split,
             .resize_split,
             .equalize_splits,
             .goto_split,
@@ -1747,6 +1748,28 @@ const Action = struct {
         }
     }
 
+    pub fn newSplit(
+        target: apprt.Target,
+        direction: apprt.action.SplitDirection,
+    ) bool {
+        switch (target) {
+            .app => {
+                log.warn("new split to app is unexpected", .{});
+                return false;
+            },
+
+            .surface => |core| {
+                const surface = core.rt_surface.surface;
+                return surface.as(gtk.Widget).activateAction(switch (direction) {
+                    .right => "split-tree.new-right",
+                    .left => "split-tree.new-left",
+                    .down => "split-tree.new-down",
+                    .up => "split-tree.new-up",
+                }, null) != 0;
+            },
+        }
+    }
+
     pub fn newTab(target: apprt.Target) bool {
         switch (target) {
             .app => {
diff --git a/src/apprt/gtk-ng/class/split_tree.zig b/src/apprt/gtk-ng/class/split_tree.zig
index 1cfaeb669..62caf7108 100644
--- a/src/apprt/gtk-ng/class/split_tree.zig
+++ b/src/apprt/gtk-ng/class/split_tree.zig
@@ -490,7 +490,6 @@ pub const SplitTree = extern struct {
             // Remove the surface from the tree.
             .surface => {
                 // TODO: close confirmation
-                // TODO: invalid free on final close
 
                 // Find the surface in the tree.
                 const tree = self.getTree() orelse return;
diff --git a/src/apprt/gtk-ng/class/window.zig b/src/apprt/gtk-ng/class/window.zig
index 739405961..f3e8ee129 100644
--- a/src/apprt/gtk-ng/class/window.zig
+++ b/src/apprt/gtk-ng/class/window.zig
@@ -335,6 +335,10 @@ pub const Window = extern struct {
             .{ "close-tab", actionCloseTab, null },
             .{ "new-tab", actionNewTab, null },
             .{ "new-window", actionNewWindow, null },
+            .{ "split-right", actionSplitRight, null },
+            .{ "split-left", actionSplitLeft, null },
+            .{ "split-up", actionSplitUp, null },
+            .{ "split-down", actionSplitDown, null },
             .{ "copy", actionCopy, null },
             .{ "paste", actionPaste, null },
             .{ "reset", actionReset, null },
@@ -1650,6 +1654,38 @@ pub const Window = extern struct {
         self.performBindingAction(.new_tab);
     }
 
+    fn actionSplitRight(
+        _: *gio.SimpleAction,
+        _: ?*glib.Variant,
+        self: *Window,
+    ) callconv(.c) void {
+        self.performBindingAction(.{ .new_split = .right });
+    }
+
+    fn actionSplitLeft(
+        _: *gio.SimpleAction,
+        _: ?*glib.Variant,
+        self: *Window,
+    ) callconv(.c) void {
+        self.performBindingAction(.{ .new_split = .left });
+    }
+
+    fn actionSplitUp(
+        _: *gio.SimpleAction,
+        _: ?*glib.Variant,
+        self: *Window,
+    ) callconv(.c) void {
+        self.performBindingAction(.{ .new_split = .up });
+    }
+
+    fn actionSplitDown(
+        _: *gio.SimpleAction,
+        _: ?*glib.Variant,
+        self: *Window,
+    ) callconv(.c) void {
+        self.performBindingAction(.{ .new_split = .down });
+    }
+
     fn actionCopy(
         _: *gio.SimpleAction,
         _: ?*glib.Variant,