Use Drafts

First of all: the button Drafts is only visible, if a draft already exists, that means you have saved a version of this wysiwyg section as draft.

Please notice, that there is only one draft!

If you click on the button Drafts the follwing window will apear:

On the right there are three possible actions, from left to right

Preview Draft leads to a preview of the whole page in a lightbox.
Restore Draft restores the draft in the current section but does not save the section. You have to decide how to carry on, choose one of the save options and click Save.
Delete Draft deletes the draft and returns to the section.