Pressing the UKEY in mesh EditMode reverts to the previously saved mesh, undoing the last edit operation (Undo and Redo).
Pressing the UKEY in mesh EditMode reverts to the previously saved mesh, undoing the last edit operation (Undo and Redo).
在编辑模式下按下UKEY来恢复以前备份的网格物体，来撤消最后的编辑操作（撤消与重做）。