Is there a way to scroll the toolbar icons of an application? On a 24" display, there is enough space to display all the toolbar icons of my applications.

But on the MacBook 13" display some of them are not displayed.

Is there a way to scroll the tools bar in order to see the entire set of icons?
I use AccessMenubarApps which works on the basic principle of temporarily replacing the current menubar with a shorter one to allow all the menubar icons to be visible. It can be accessed by clicking on the icon, via mouse gestures, or a configurable hotkey.