You can create special links with which you can allow the user to expand and collapse all the toggles in the current topic with a single click. There are a number of very useful things you can do with this feature. For example, it allows you to write help for both novice and experienced users on the same page. You could then create More Detail / Less Detail links in the topic header for switching between the two versions. You can also use it to create a Print button that will pre-expand all the toggles in the current topic before it is printed.