Hi,Designer was initially a product from a company named JetForm which
was acquired by Adobe in 2002 and its interface hasn't been changed that
much by Adobe.Here some hints for you:If you double click a ruler you'll
be able to edit the Drawing Aids.You can set snap to grid or to
guideline etc.In ES3 and newer you also can activate orientation by page
center or other objects which is quite similar to the smart guides you
may know from InDesign.Draging guides from the rulers also works, but
only ...