This new feature will help save a lot of time by allowing you to copy/paste content from one guideline to another. From now on, you can easily keep two guideline tabs open and transfer your content from the first one to the other.
To do so, you will just need to copy your content from one guideline, go to another guideline (in another tab), and then copy the content on the new tab. The content will then be transferred in an easy way!