Un-do using History
One of the most useful new features in Dreamweaver 3.0 is the History
window. If you are familiar with PhotoShop you are probably familiar with
the History feature.
Within this window, each action you have performed since opening your
document is listed, so you can keep track of your actions and easily undo
or repeat your last step.
Simply highlight the last step in the History window and hit your Delete
key, or drag the sliding indicator up the list of steps to delete several
steps at once.
You can also click the window's
Replay button to perform the step again.
The default number of steps is 50? To increase it, select Edit/Preferences,
make sure you're on the General tab, and enter a higher number
in the "Maximum Number of History Steps" field.
NOTE:: The more steps you want to save, the more memory you'll use.