Line renderer over UI

Hello everybody! Does anybody know any way of drawing lines via line renderer so that the lines are displayed over the UI elements? I know about the way of creating two cameras and changing the canvas render mode to Screen Space - Camera, but I need to avoid this, because I have Layout Groups in my canvas, and when I enter the Camera rendering mode it all just becomes a big mess, and, in fact, I do not want to reset all the layout options. I also tried to play with the cameras' depth and Depth Only clear flags, but it didn't work for me. I simply want to draw the lines over the UI without changing Canvas render mode. Please help!