The quick guide buttons allow you to quickly do common GuideGuide tasks that don’t require configuration. You can add guides at the sides and midpoints of the current context. You can clear guides. You can also toggle guide visibility. Just click the button and the thing will happen.

Left Guide
Center Guide
Right Guide
Top Guide
Middle Guide
Bottom Guide
Clear Guides
Toggle Visibility

Adobe XD

You can find the quick guides in Adobe XD from the menu Plugins > GuideGuide > Quick Guides or by pressing + opt + g.