 So you don't understand adding curves, not a problem. Add to curve lets you add curves to an edge by left clicking, but unlike doing this with point action, edge action curves for some reason aren't really connected, so you cannot do your normal curve stuff like chains and tubes with them. But what it can do really well is bevel. If you right click on a curve, you will get the exact same options that you saw in point actions, and they work exactly the same way. You can choose from doing nothing, delete the curve, or make a bevel. The rows modifier determines how many segments emerge from the bevel. It defaults to single, but you can also choose between two, four, and eight segments. This area here determines the pattern of segmentation. Linear means the segment is divided equally. Sharp pushes most of the segments towards the edges, and soft pushes most of the segments to the middle. And if you want a custom distance, you can decide that here. Hope that helps, and as always, I hope you have a fantastic day, and I'll see you around.