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- [Instructor] In this movie,
I'm going to demonstrate

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the relationship between undoing
and redoing in Illustrator,

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not because it's exclusive to artboards,

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but rather because it's
a fundamental concept

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when using this very powerful program.

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Behind the scenes, I went
ahead and moved artboard one

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independently of numeral one
inside of the same document

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we were working with
in the previous movie,

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and I can still undo that
operation by going up

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to the edit menu and
choosing the undo command or

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pressing control Z here on the
PC or command Z on the Mac,

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and I can undo any
previous operations as well

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by continuing to press
control or command Z.

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The same goes for redoing.

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I can go up to the edit menu
and choose the redo command

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at this point or press
the keyboard shortcut,

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control shift Z or command
shift Z on the Mac,

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and I can continue to press
that keyboard shortcut

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multiple times in a row
to redo as many operations

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as there are to redo.

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At some point, I am going to
run out of operations to redo,

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however, at which point the redo command

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under the edit menu will appear dimmed.

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The great thing about multiple
undo's inside of Illustrator

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is that they survive a save operation,

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so if I go up to the file menu
and choose the save command

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or press that keyboard shortcut,

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control S or command S on a Mac.

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I have now saved the
document, as indicated

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by the lack of asterisk after the title

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here in the title tab, and yet I can still

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press control Z or command Z on a Mac

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in order to undo the various operations

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that I applied before saving.

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The one thing you cannot
undo in Illustrator,

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however, is a revert.

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For example, if I go up to the file menu

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and choose the revert
command, or I can press

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the keyboard shortcut, F12 here on the PC,

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on the Mac, it's a very different shortcut

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of command option Z.

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Then I'll get this alert
message which tells me that

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I'm going to abandon
all of my modifications

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and reload the saved
version of my document.

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It's very important that you respond

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to this alert message deliberately,

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because it is permanent.

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Notice if I click on the
revert button, in order to

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restore that saved
version of the document,

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which now features the artboard

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disassociated from the numeral one,

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and notice if I go up to the edit menu,

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both the undo and redo
commands are dimmed,

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so if I want to restore my
document to the way it looked

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when I first opened it
in the previous movie,

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I'm going to have to do so manually

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by switching to the artboard
tool, which, once again,

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you can get by pressing shift
O, and then I'll just go ahead

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and drag that artboard into
place and, assuming that I have

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smart guides turned on, as by
default, then at some point,

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I'm going to see those
intersection lines appearing

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through the center of
artboards two and five,

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at which point I'll go ahead
and release in order to

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reestablish that artboard
to its proper location.

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Then, I'll press the escape key

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in order to return to
the black arrow tool.

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I'll go up to the view menu
and choose fit all in window

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in order to center my
artboards, and then I'll go

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up to the file menu and
choose the save command

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in order to save my modifications to disk.

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That is the relationship
between undoing and reverting.

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Specifically, you can undo and redo

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just about anything you like,
except for the revert command.