CB 8.5 Score: What does the "align" context menu item do?

In score edit (page mode) it is possible to right mouse click on a dynamic sign (ppp, p, ff, etc) and select “align” from the right click context menu. What does it do? Usually nothing, were is supposed to align to?

It has no meaning if there is only one dynamic event selected, but, as soon as you select multiple dynamic events (even if not contiguous), it aligns them to one another.