private void maakAktieMenu()
{
ToolStripMenuItem menu = new ToolStripMenuItem("Aktie");
menu.DropDownItems.Add("Terug (ctrl + z)", null, undo);
menu.DropDownItems.Add("Vooruit (ctrl + y)", null, redo);
menu.DropDownItems.Add("Clear", null, schetscontrol.Schoon);
menu.DropDownItems.Add("Kies kleur", null, (o, e) => schetscontrol.VeranderKleur(kleurButton, new EventArgs()));
menuStrip.Items.Add(menu);
}