It’s finally here and it should be very helpful to keep things aligned in your slides. Just press ⇧R (or Shift+R on Windows) to toggle the rulers and start dragging from the top or left to make guidelines appear. You can easily remove them by pressing delete or manually change their position from the right column.
You can edit the guideline position like you would on any other objects in Ludus. For the horizontal guidelines, you can only change the Y position and for the vertical ones, only the X position. And if you want to go really custom you can change the color of your guideline (if you need to define different types of guidelines for you and your team).