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Vertically centers the selected objects. If only one object is selected in Draw or Impress, the center of the object is aligned to the vertical center of the page.
Choose .
From the tabbed interface:
Choose (text selected).
Select - deck.
To align the individual objects in a group, choose Format - Group - Enter Groupdouble-click to enter the group, select the objects, right-click, and then choose an alignment option.