You open the WBS window from the MPM Menu Manager. When you open the WBS window, you select the project you want to view and the data to download.
To open the WBS window from the Menu Manager window, do one of the following:
Select the Projects tab and choose the Work Breakdown Structure icon.
Click File » Projects » Work Breakdown Structure.
MPM displays the WBS Open dialog box.
Choose a project from the Project list box.
To select the data to be downloaded, do one or more of the following:
Filter
by WBS Leg — Click the checkmark
box next to the desired WBS Leg(s), using the 
and 
boxes to expand or collapse the legs if
necessary.
Filter by WBS Manager — Using the Shift and Ctrl keys, click the particular Manager(s) who are assigned to the WBS elements you want to download.
Filter by WBS Element Type — Select the type(s) of WBS elements you want to download.
To accept the selections and display the WBS window, click OK.
When the WBS window opens, the WBS elements you described above are downloaded.
If the project you selected does not yet have Start and Complete dates assigned in the Project Maintenance window, MPM displays the Project Start and Complete Dates dialog box so you can enter these dates.