diff --git a/resources/definitions/fdmprinter.def.json b/resources/definitions/fdmprinter.def.json
index a102351f2d..bfd0d1f73b 100644
--- a/resources/definitions/fdmprinter.def.json
+++ b/resources/definitions/fdmprinter.def.json
@@ -1418,31 +1418,34 @@
                     "enabled": "z_seam_type == 'back'",
                     "default_value": "back",
                     "limit_to_extruder": "wall_0_extruder_nr",
-                    "settable_per_mesh": true
-                },
-                "z_seam_x":
-                {
-                    "label": "Z Seam X",
-                    "description": "The X coordinate of the position near where to start printing each part in a layer.",
-                    "unit": "mm",
-                    "type": "float",
-                    "default_value": 100.0,
-                    "value": "0 if (z_seam_position == 'frontleft' or z_seam_position == 'left' or z_seam_position == 'backleft') else machine_width/2 if (z_seam_position == 'front' or z_seam_position == 'back') else machine_width",
-                    "enabled": "z_seam_type == 'back'",
-                    "limit_to_extruder": "wall_0_extruder_nr",
-                    "settable_per_mesh": true
-                },
-                "z_seam_y":
-                {
-                    "label": "Z Seam Y",
-                    "description": "The Y coordinate of the position near where to start printing each part in a layer.",
-                    "unit": "mm",
-                    "type": "float",
-                    "default_value": 100.0,
-                    "value": "0 if (z_seam_position == 'frontleft' or z_seam_position == 'front' or z_seam_position == 'frontright') else machine_depth/2 if (z_seam_position == 'left' or z_seam_position == 'right') else machine_depth",
-                    "enabled": "z_seam_type == 'back'",
-                    "limit_to_extruder": "wall_0_extruder_nr",
-                    "settable_per_mesh": true
+                    "settable_per_mesh": true,
+                    "children":
+                    {
+                        "z_seam_x":
+                        {
+                            "label": "Z Seam X",
+                            "description": "The X coordinate of the position near where to start printing each part in a layer.",
+                            "unit": "mm",
+                            "type": "float",
+                            "default_value": 100.0,
+                            "value": "0 if (z_seam_position == 'frontleft' or z_seam_position == 'left' or z_seam_position == 'backleft') else machine_width/2 if (z_seam_position == 'front' or z_seam_position == 'back') else machine_width",
+                            "enabled": "z_seam_type == 'back'",
+                            "limit_to_extruder": "wall_0_extruder_nr",
+                            "settable_per_mesh": true
+                        },
+                        "z_seam_y":
+                        {
+                            "label": "Z Seam Y",
+                            "description": "The Y coordinate of the position near where to start printing each part in a layer.",
+                            "unit": "mm",
+                            "type": "float",
+                            "default_value": 100.0,
+                            "value": "0 if (z_seam_position == 'frontleft' or z_seam_position == 'front' or z_seam_position == 'frontright') else machine_depth/2 if (z_seam_position == 'left' or z_seam_position == 'right') else machine_depth",
+                            "enabled": "z_seam_type == 'back'",
+                            "limit_to_extruder": "wall_0_extruder_nr",
+                            "settable_per_mesh": true
+                        }
+                    }
                 },
                 "z_seam_corner":
                 {