A family of Microsoft word processing software products for creating web, email, and print documents.
On the Developer tab, in the Controls group, click on Legacy Tools. While the gallery is open, right-click on it and choose Add Gallery to Quick Access Toolbar. That will give you a button for the gallery (which also includes the ActiveX controls); that's the closest you can get unless you want to add each button separately through the Customize the Quick Access Toolbar dialog.