挤出边线

参考

模式

Edit Mode, Edge Selection mode

菜单

Edge ‣ Extrude Edges

快捷键

Alt-E

Extrude edges as individual edges, use Alt-E to access the Extrude Edges.

../../../../_images/modeling_meshes_editing_edge_extrude-edges_before.png

选中边。
../../../../_images/modeling_meshes_editing_edge_extrude-edges_after.png

单条边挤出。