 So you just want to close things, not a problem. If target is set to concave hole and you left click an open edge, it will automatically try and fill the empty space. But if target is set to convex hole, that is when a bunch of options will show up. If you left click dragon edge now, moving the mouse left and right controls the height and moving the mouse up and down controls how many edge loops it has. The shape is controlled here and in order here is what they all look like. Line, arcs in line, tight round corners, circle, round corners, straight lines, arcs, small round corners, and one line. Now let's take a look at the modifiers. Converge at center means the whole thing closes at a point in the middle. Converge to edge means the peak of the hole is positioned in the middle of the edge you clicked on. And converge to point means the peak of the hole is positioned closest to the point of the edge you clicked on. Interactive curvature means you can left click drag to change the height of the peak. Optimal curvature means ZBrush automatically chooses the height for you, but you can still drag and control the amount of polyloops. And if you want a specific height of the peak, you can control that over here. The higher the value, the higher the peak. Interactive resolution means you can drag click the amount of edge loops you want. If you change it to optimal resolution though, ZBrush will decide the number of edge loops for you. And if you need a specific number of edge loops, let's say for example, you set this to eight. That means when you left click, it'll create eight edge loops when closing your hole. 360 twist means as you left click drag, it will twist your topology on the way up. And again, if you want to twist a specific amount, like maybe 180, you can set that here. Polygroup columns means each vertical column will get its own polygroup. Polygroup row means each new horizontal row will get its own polygroup instead. And polygroup flat means it will keep all polygroups the same color. Hope that helps, and as always, hope you have a fantastic day. And I'll see you around.