Pan with Right click

CamDrag.cs

using UnityEngine;

public class CamDrag : MonoBehaviour
{
    bool isDragging = false;

    Vector3 mousePos;
    Vector3 clickedPos;

    void Update()
    {
        if (Input.GetMouseButtonDown(1))
        {
            clickedPos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
            isDragging = true;
        }

        if (Input.GetMouseButtonUp(1))
        {
            isDragging = false;
        }

        if (isDragging)
        {
            mousePos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
            transform.position -= (mousePos - clickedPos);
        }
    }
}