How to keep a button in pressed state?

public Canvas canvas; public Canvas cash; public Canvas tournaments; public Canvas practice; public Canvas pointsrummycanvas; public Canvas poolrummycanvas; public Canvas dealsrummycanvas; public Canvas pointsrummycanvas1; public Canvas poolrummycanvas1; public Canvas dealsrummycanvas1; public Button cashbutton; public Button tournamentsbutton; public Button practicebutton; public void Onclick() { cash.gameObject.SetActive(true); tournaments.gameObject.SetActive(false); practice.gameObject.SetActive(false);

 }
 public void Onclick1()
 {
     cash.gameObject.SetActive(false);
     tournaments.gameObject.SetActive(true);
     practice.gameObject.SetActive(false);
 }
 
 public void Onclick2()
 {
     cash.gameObject.SetActive(false);
     tournaments.gameObject.SetActive(false);
     practice.gameObject.SetActive(true);
 }
 public void Onclick3()
 {
     poolrummycanvas.gameObject.SetActive(false);
     pointsrummycanvas.gameObject.SetActive(true);
     dealsrummycanvas.gameObject.SetActive(false);
     cashbutton.Select();
 }
 public void onclick4()
 {
     canvas.gameObject.SetActive(true);
     pointsrummycanvas.gameObject.SetActive(false);
     poolrummycanvas.gameObject.SetActive(true);
 }
 public void Onclick5()
 {
     pointsrummycanvas.gameObject.SetActive(false);
     poolrummycanvas.gameObject.SetActive(false);
     dealsrummycanvas.gameObject.SetActive(true);
 }
 public void Onclick6()
 {
     pointsrummycanvas1.gameObject.SetActive(true);
     poolrummycanvas1.gameObject.SetActive(false);
     dealsrummycanvas1.gameObject.SetActive(false);
    
 }
 public void Onclick7()
 {
     pointsrummycanvas1.gameObject.SetActive(false);
     poolrummycanvas1.gameObject.SetActive(true);
     dealsrummycanvas1.gameObject.SetActive(false);
 }
 public void Onclick8()
 {
     pointsrummycanvas1.gameObject.SetActive(false);
     poolrummycanvas1.gameObject.SetActive(false);
     dealsrummycanvas1.gameObject.SetActive(true);
 }
  

}