Displays
If a button or Menu option is requested that has multiple sub-options within it, we would expect you to make all options visible and interactive to the user in some fashion. IE: Sub-menus, etc. It is not acceptable to ever display a button or menu item to an end user in a way that makes it seem like something will happen if it’s clicked, but we actually do nothing or just close the window if it’s clicked.
Example
If/when Sub-menus are used, it’s also expected that their orientation vs. the end of the page is taken into consideration, so that the sub-menu is visible. Using the example above, if the menu was opening up on the far right of the browser screen, then the sub-menu would technically need to open on the left of the parent menu, not the right, so that the sub-menu options would be visible to the user.