I created a custom toolbar and shared it with another person, but it looks different on their computer.
The buttons and commands that you share with another person are always available, but whether or not they appear on the short version of the menu, or on the toolbar (toolbar: A bar with buttons and options that you use to carry out commands. To display a toolbar, press ALT and then SHIFT+F10.) when there isn't enough room to display all the buttons, depends on the individual menu and toolbar settings for that person.
Microsoft Office stores the commands and buttons you've used frequently and recently as your personal menu and toolbar settings. When the Always show full menus check box is cleared (Toolbar Options arrow, Add or Remove buttons, Customize dialog box, Options tab), these personalized settings affect the commands that appear on each menu. Additionally, if there isn't enough room on a toolbar to display all the buttons (such as when you position a toolbar on the same row as another toolbar), personalized settings affect which buttons do appear.
I can't customize a submenu.
A submenu that has a line of dots at the top
cannot be customized. If you drag the submenu away from a menu, it appears as though you can customize the submenu by dragging a command or other item onto the submenu from the Customize dialog box (click Customize on the Tools menu, and then click the Commands tab). However, when you close the Customize dialog box, any customizations made to the submenu disappear.