When constructing a walkthrough, sometimes you want to select an element that is only visible, for example, when a menu is expanded:
It can be challenging to juggle the Editor window and keeping the menu expanded when you need to select the element. The menu has either disappeared so it can't be selected through the UI, or if you capture the jQuery selector using your browser's developer tools, you see an error when you use the element selector tool and you are unable to click the Use It! button:
Frustrating, we know. Now you can check the Advanced: Allow dynamic selectors box and the UI will accept the selector.
You don't even have to try to capture the selector through the UI. Instead, you can use the element inspector in your browser's developer tools. You can read more details about the steps here: Choosing the best anchor for your walkthroughs