Version 1.20.x
Highlight WebElements
It's now possible to highlight the web elements your test interacts with. This might be helpful to visually debug the execution. You just need to configure this:
application:
highlight: { }
and a 3px red border will be applied to web elements targeted by the test, as the username input field in this screenshot:

The highlight is fully customisable. Check the docs for all the details.