Reusing content can save valuable time and ensure consistency across your guides for information that you want to appear across multiple guides of yours. There are two quick ways you can reuse content: mapping and copying. Mapping will allow for content to be updated across multiple guides just once in the original instance of the box. Copying a box does not automatically update across multlple guides, but it does allow you to reuse content and change relevant pieces to suit the new audience.
Mapped boxes allow you to change the content in a box as it appears in multiple different places. If you change the content in a mapped box in its original place, that content will change across all of the places its mapped to. This is useful if you have multiple Course Guides with similar content.
To add a mapped box to your LibGuide:

Copying boxes allows you to use the box as a template but change the content to be more relevant to its new context without changing the content in the original box. The steps for copying an existing box is nearly identical to mapping a box, but it has one extra step. You'll need to scroll down in the Reuse Existing Content tab down and click the box that says "Copy"
