The Stack commands, which complement the Align commands, move the selected shapes so that shapes are arranged from left to right or top to bottom such that adjoining edges aligned to one another. By stacking shapes horizontally, the select shapes will be moved so that they are arranged from left to right, the right-hand edge of left most shape will be aligned to the left-hand edges of the next and so forth. The first select shape will remain in its original position and all the other shapes will be arranged around it.

To vertically stack a number of shapes

§    Select the shapes to be stacked. The first shape selected will be the dominant shape about which the others will be rearranged.

§    Choose Stack Vertically from the Geometry menu, or

§    Click on the Stack Vertically button in the Geometry toolbar

Each of the shapes will be moved vertically so that top of one shape is aligned to the bottom of the adjacent shape.