Here is the code:
Now when I typee in the cell numbers, I just typed it across and it did not wrap the text to another line.
Private Sub Worksheet_SelectionChange(ByVal Target As Range)
Dim myRange As Range
Set myRange = Range("e50, e54, ab52, ab54, m58, bi50, bi54, e70, e74, e78, e82, aw70, aw74, aw78, aw82, cs70, cs74, cs78, e93, e97, e101, e105, ba93, ba97, ba101, cr93, cr97, d118, d122, d126, g130, g134, d138, d142, d146, ak118, ak122, ak126, ak130, ak134, ak138, ak142, bz118, bz122, bz126, bz130, bz134, bz138, bz142, bz146, dd118, dd122, dd126, dd130, d156, d160, bn156, bn160, bn164, bn168, bn172, bn176, bn180, bn184, d183, d187, bt193, cm193")
If Not Intersect(Target, myRange) Is Nothing Then
Select Case ActiveCell.FormulaR1C1
Case ""
ActiveCell.FormulaR1C1 = "x"
Case "x"
ActiveCell.FormulaR1C1 = ""
End Select
End If
End Sub