 So, you don't understand face curves, not a problem. Add the curve for faces lets you put curves around your target of choice. If you don't know what these targets do, look at my tutorial, all Z-modeler targets in 9 minutes for the crash course. But just for a few quick examples, a single poly just puts curves around whatever face you click, and Polygroup Island will add curves to any group of faces that are the same color. Once you've added curves, you can do all your normal curve tricks like adding chains, ropes, tubes, and tails. And as with all curve actions, if you right click on a curve you'll get a few extra options that you can do next time you left click on a curve. Which include do nothing, delete all curves, or just delete a single curve. And of course the bevel which comes with the traditional settings of bevel in one row, two rows, four rows, or eight rows. Linea means each segment is equal distance apart, sharp edges mean most of the edge loops happen around the edges, soft edges means most of the edge loops appear in the middle, and if you want a custom edge loop pattern you can change that here. The higher the value the sharper, the lower the value the softer. Hope that helps and as always I hope you have a fantastic day and I'll see you around.