Using Multiple Undo in Microsoft Project

With the Multiple Undo feature in Microsoft Project 2007, you can try out several changes and then undo the whole list of changes or a portion of them at once. Because you often want to try out several changes when finalizing or making adjustments to a project — for example, changing the timing of a set of tasks — Multiple Undo can be very handy.

Though an undo feature sounds simple, it can have a lot of value when working with a project, because individual changes to timing in your project plan can cause hundreds of changes in a large schedule. For that reason, undoing several actions in a row in Project was a major technology challenge.

The ability to try out different scenarios that involve several changes to a project is extremely useful. In the past, you had to do an action and then undo it, then do the next action and undo it, and so on, which is time-consuming and doesn't really enable you to see cumulative effects.

Be aware that you have to undo all changes in order. For example, if you made six changes and you want to undo the fourth change, you have to undo changes four through six. Here's how to undo more than one change:

1. Make all the changes you want to your schedule but don't save the schedule yet.

2. Click the down arrow to the right of the Undo icon on the Standard toolbar.

You see a list of changes you've made, starting with the most recent action at the top.

3. Click the change you want to undo.

That change and all others you performed subsequent to it are undone.

If you choose a high number of Undo operations, it can slow down your computer a bit because it then must keep that many actions in memory.

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