Option Explicit
Public cel As Range 'À mettre en dessus de Sub Ajout_ligne()
With Sheets("Choix matériaux")
set cel = .Cells(3, "A")
End with
With cel
.EntireRow.Insert Shift:=xlDown
cel.Offset(-1, 0).EntireRow.Copy Sheets("Choix matériaux").Cells(cel.Row, 1)
End With
With Sheets("Gestion_macros")
set cel = .Cells(2, "A")
End with
With cel
.EntireRow.Insert Shift:=xlDown
.Offset(-1, 0).EntireRow.Copy Sheets("Gestion_macros").Cells(.Row, 1)
End With