The Responsive Ruler/Grid Overlay Widget is an amazing widget for everyone working on the UI in OutSystems, specially if you want things to look nice and align perfectly. And your Screen should be pixel perfect then this will help. Think of it as the perspective of a designer - A see-through grid on which you can build and examine your application. You turn it on and off with a button, and with the help of it you have got perfectly spaced lines helping you to make sure everything is aligned properly, spaced evenly, and it majorly helps with the responsiveness of screens. This is like having a ruler or grid paper in real-world, but inside your OutSystems application. Thank You