Aligns the left edges of the selected objects. If only one object is selected in Draw or Impress, the left edge of the object is aligned to the left page margin.
Horizontally centers the selected objects. If only one object is selected in Draw or Impress, the center of the object is aligned to the horizontal center of the page.
Aligns the right edges of the selected objects. If only one object is selected in Impress or Draw, the right edge of the object is aligned to the right page margin.
Vertically aligns the top edges of the selected objects. If only one object is selected in Draw or Impress, the top edge of the object is aligned to the upper page margin.
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.