Causes the currently selected elements to be repositioned on the label image so that they are centred either across or down the label or both.
Note that the repositioning is of the rectangle allowed for the element - not for the contents of the rectangle. If the rectangle is not the same size as the content the content may not appear in the position expected. An element’s rectangle may be adjusted to fit it content by choosing Resize (see above).
Not available unless at least one element is selected.
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