hide or unhide rows depending on a criteria

Hello,

you would need a macro for this. In the following screenshot, cell E2 contains the dropdown with the words hide or unhide. Depending on the selection rows 4 and 5 will be hidden.

The macro code to do this goes like this:

Private Sub Worksheet_Change(ByVal Target As Range)
If Not Intersect(Target, Range("E2")) Is Nothing Then
    If Target.Value = "unhide" Then
        Rows("4:5").EntireRow.Hidden = False
    Else
        Rows("4:5").EntireRow.Hidden = True
    End If
End If
End Sub

Copy the code, right click on the sheet tab and select View Code. Paste the code into the code window and adjust the references to what you want to hide and where the dropdown is.