cmenu:

Format:

cmenu: name, row [, col]

Creates an empty menu with name. Row is the line of the first menu item. An optional col can be used to specify which column to use to position the menu. If col is not supplied, the menu will be centered on the screen using the current screen width.

Parameters:

name: A menu name. Each menu must have a unique name.
row: A number that specifies the row of the first menu item.
col: An optional number that specifies the column to print the menu.