Assigning Event handler to a button

Hello there,

It is my first post, so I will like to say thanks to everyone who has helped somebody in one way or the other on this forum. I have been able to work around some vba issues just by reading the answers from other threads.
I am new to vba programming in excel so my question might look simple but I have battled with it for hours, SOS any one.

the code I created, works well and triggers for individual cells in the range but prematurely, instead I want to be able to click a button
after I have inputed all the data so that the event handler will then run through my target named range before calling the concerned macro email automation.

Hope my explanation is clear a little, my coding might also be amateurish. bear with me.

thanks in advance.

Private Sub Worksheet_Change(ByVal Target As Range)
    If Target.Cells.Count > 1 Then Exit Sub
    If Not Application.Intersect(Range("Relevant"), Target) Is Nothing Then
        If IsNumeric(Target.Value) And Target.Value < 0.95 And Target.Value >= 0.9 Then
            Call Email
    ElseIf IsNumeric(Target.Value) And Target.Value < 0.9 And Target.Value >= 0.85 Then
        Call Email1
    ElseIf IsNumeric(Target.Value) And Target.Value < 0.85 Then
        Call Email2
        End If
    End If
End Sub