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Use
You can adjust the plan values in a project or in selected WBS elements - that is, you can increase or decrease them by a particular percentage or amount.
Procedure
The Adjustment dialog box appears.

If you want to reduce the plan value, enter a minus sign ("-") after the figure.
, or using quick info text Continue (Enter).The system updates the plan values per your input.
, or using quick info text Save (Ctrl.+S).
