what replaces Toggle Using Button Style in New GUI?

I've figured out how to make a Button act like a Toggle with the below code in my UIManager C# Script, and assigning (in the INSPECTOR) the GameObject "Pressed" to the UIManager script. HOWEVER: The button still appears like a button. When I press it, it momentarily changes color, but does not stay the same color. I am thinking I need to fetch a different image from within the script? public class TabletUI : MonoBehaviour { public GameObject Pressed;

     private bool toggle = false;
 
     public void PB_1()
     {
 
         if (!toggle)
         {
            Pressed.SetActive(true);
             toggle = true;            
             Debug.Log("Sirens ON");
 
 
         }
         else
         {
             Pressed.SetActive(false);
             toggle = false;
             Debug.Log("Sirens OFF");
 
         }
     }
 }