i just want to ask how to change the height og menu bar in dreamweaver if it is possible

Hy you can change your menu bar with css or jquery good luck

You can use CSS height property.
The height property sets the height of an element.
e.g.
height:100px;

ul.MenuBarHorizontal{
    margin: 0;
    padding: 0;
    list-style-type: none;
    font-size: 100%;
    cursor: default;
    width: auto;
    height:8px;

}