Tested on macOS using `"com.unity.inputsystem":"1.0.0-preview.4"`. Using 2 external monitors with the Macbook lid closed.

When reading the mouse position, x values are starting at the far right of the window and decreasing to negative width on the far left, and y is starting at what seems to be the top of the status bar and going up. The docs say that input should be mapped to EditorWindow coordinates, but that doesn’t seem to be the case.

Tested with the following script:

[CODE]
using System;
using UnityEditor;
using UnityEngine;
using UnityEngine.InputSystem;
public class InputTesting : EditorWindow
{
[MenuItem("Window/Debug SceneView Input")]
static void Init()
{
GetWindow<InputTesting>();
}
void OnEnable()
{
SceneView.duringSceneGui += OnSceneView;
}
void OnDisable()
{
SceneView.duringSceneGui -= OnSceneView;
}
void OnSceneView(SceneView view)
{
var mouse = $"{Mouse.current.position.x.ReadValue()}, {Mouse.current.position.y.ReadValue()}";
Handles.BeginGUI();
GUILayout.Label(mouse);
Handles.EndGUI();
if (Event.current.type == EventType.MouseMove)
SceneView.RepaintAll();
}
}
[/CODE]