Using the Undo / Redo mechanism, you can go backward and forward in your part creation process. You can either proceed step by step, or choose a particular step as your destination.
Notes:
Undo / Redo is only relevant for all operations starting from when you opened the file. If you open a saved file, you cannot undo operations performed before the file was closed.
Operations in undo / redo include editing and deleting of features.
Once you undo to a certain step, as soon as you enter another function you can no longer redo any later steps.
To Undo / Redo step by step:
If you click on the 
or 
buttons, you
will proceed backward or forward through all steps, one step at a time.
To Undo / Redo to a particular step:
Click on the 
for either undo or redo to see a chronological
list of steps. Choose the step to which you would like to revert (undo)
or jump (redo). This is illustrated in the following example:
Example:
The feature tree shown below shows the order of steps used to create the part.
Press the arrow next to Undo.
All steps are shown in order starting from most recent. In order to go
back to before the Revolve18 feature was created, select the 5 most recent
steps. (These steps include Sketcher16,
the sketch from which Revolve18
was created.)
The part now looks like the following:
Now, in order to re-create some steps, press the arrow
next to Redo. This list starts
with the earliest step, proceeding to the most recent.
Select the first 3 steps on the list to re-create up to Axis-Parallel17.
The part now looks like this. All steps have been completed except creating the Revolve18, and Hiding the elliptical sketch.
To re-create the part to the end, press the Redo arrow and select both remaining steps.
The Revolve18 is now re-created, and the sketch is now hidden.
