Using Dynamic Guides
In addition to the menu guides, there are also dynamic guides that automatically appear
as you drag menu objects. Dynamic guides make it easy to align menu objects with each
other and with the menu’s center. As you move a menu object around, lines appear and
the object snaps into position whenever one of its edges or its center is in alignment
with another object’s edge or center or the menu’s center.
This tool is especially useful when you are creating duplicates of an existing button (by
Option-dragging it) and want them all to line up with each other.
Only the guide preference’s color setting applies to dynamic guides—they do not
disappear when you hide the menu guides.
To temporarily hide the dynamic guides and disable their snapping action
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Hold down the Command key while you drag the menu object.