<div>
Open Word 2016, and right click in blank space in the ribbon. Choose Customize QAT, choose all commands and at the Top of the list is Separator. &nbsp;<br />
<br />
Add a Separator. &nbsp;I have done this and it works.<br />
<br />
I cannot see a way to adjust the size of the separator.
</div>


Open Word 2016, and right click in blank space in the ribbon. Choose Customize QAT, choose all commands and at the Top of the list is Separator.  

Add a Separator.  I have done this and it works.

I cannot see a way to adjust the size of the separator.

<div>
Will custom icons thicken the separator bar? &nbsp;Not unless the separator bar itself is a custom icon.
</div>


Will custom icons thicken the separator bar?  Not unless the separator bar itself is a custom icon.

<div>
<div class="content wysiwyg-content">
How can I add a group separator in a Quick Access Toolbar in Word 2016, and how can I make the vertical separator thicker and more noticeable?
</div>
</div>


How can I add a group separator in a Quick Access Toolbar in Word 2016, and how can I make the vertical separator thicker and more noticeable?

Thicken vertical separators in a Quck Access Toolbar in Word 2016

Microsoft Office is an integrated suite of applications that includes Outlook, Word, Excel, Access, PowerPoint, Visio and InfoPath, along with a number of tools to assist in making the individual components work together. Coding within and between the projects is done in Visual Basic for Applications, known as VBA.

Microsoft Office

Microsoft Access is a rapid application development (RAD) relational database tool. Access can be used for both desktop and web-based applications, and uses VBA (Visual Basic for Applications) as its coding language.

Microsoft Access

Microsoft Word is a commercial document editing program that is part of the Microsoft Office suite. It features numerous text-editing tools for creating richly formatted documents, along with tools for the use of macros in Word documents. Word's native file formats are denoted either by a .doc or .docx file extension. Plugins permitting the Windows versions of Word to read and write formats it does not natively support, such as the OpenDocument format (ODF) are available. Word can import and display images in common bitmap formats such as JPG and GIF. It can also be used to create and display simple line-art.