def add_sheet(client, position=None, drawing=None):
    """Add a drawing sheet.

    Args:
        client (obj):
            creopyson Client.
        position (int, optional):
            Position to add the sheet.
            Defaults: Sheet will be added to the end.
        drawing (str, optional):
            Drawing name. Defaults is current active drawing.

    Returns:
        None

    """
    data = {}
    if position:
        data["position"] = position
    if drawing:
        data["drawing"] = drawing
    return client._creoson_post("drawing", "add_sheet", data)