It redoes one command (operation) to have returned immediately forward.

ツール	キーボード
	CTRL＋Y

Of returning a command only for the number, the redoing is possible but when starting a command newly on the way,
it cannot return since it. Even if it starts this command, the command which was starting before it is continued but in thefollowing command, this command cannot be used.

(Object Generate)
[Wire] [Wire Deform] [Sweep] [Revolve] [Polyhedron] [Assign Section]

(Object Edit)
[Resize(Curve)[Vertex]] [BaseWire Edit[Vertex]] [Base Line Edit[Vertex]]
[Base Circle Edit[Vertex]]

(Object Deform)
[Point Move[Ctl-P]] [Line Move[Ctl-P]] [Insert[Ctl-P]] [Line Rotate[Ctl-P]] [Twist[Ctl-P]]
[Extend/Reduce[Ctl-P]] [Section Deform[Ctl-P]] [Move Rails[Ctl-P]]
[Base Wire Deform[Ctl-P]] [Base Surface Deform[Ctl-P]] [Tension Coefficient]

(Tool)
[Generate Setting] [Arrange Setting] [Ruler] [Protractor]