A menu or menu item can be selected by clicking the mouse button over its label. Selected menus are marked by a bordering green or cyan box. Selecting the label of a menu will drop down its pane, showing all the items it contains. Multiple items can be selected by holding down the <Shift> key and clicking on several items. To add a menu or item to another menu, drop it onto the menu’s open pane.
You can also select the menu bar and edit its properties but it cannot be moved. You are not allowed to resize menus or the menu bar; they are resized automatically when new items are added to them.