To add a content control that allows users to select a Quick Part, add a Building Block Gallery content control.

Building Block Gallery

A collection of pre-designed and customizable blocks of content, such as text, graphics, or formatting, available in some software applications to easily insert and use in documents.

Quick Part

A feature in Microsoft Office programs that allows users to create, store, and reuse pre-made elements or blocks of text and graphics across their documents.

Content Control

A feature in document management systems that allows users to restrict access to content based on user roles or other criteria.