DockPosition

DockPosition описывает выравнивание Overlay в DockZone.

Используйте DockPosition в OverlayAttribute для установки расположения по умолчанию для Оверлей.

using UnityEditor;
using UnityEditor.Overlays;
using UnityEngine;
using UnityEngine.UIElements;

// Use OverlayAttribute to specify that in new Scene Views, when this Overlay is first opened it will be in the
// top toolbar, aligned to the left side.
[Overlay(typeof(SceneView), "Docked Top Toolbar, Left Aligned", defaultDockZone = DockZone.TopToolbar, defaultDockPosition = DockPosition.Top)]
class MyOverlay : Overlay
{
    public override VisualElement CreatePanelContent() => new Label("Overlay Contents");
}