Use Dynamic Input, or Not - AutoCAD shows useful information near cursor, provides clues, angles shown differently, EllenFinkelstein.com, Dec 7, 2010

Using XREF: Attachment vs. Overlay - attached/overlaid reference in AutoCAD, Edwin Prakoso, CAD Notes, Jun 2, 2010

Dynamic Mirror - sketch tool, drag/drop to sketch toolbar, Jeff's Tool Shed, May 26, 2010

Marking Up Drawings with Volo View and AutoCAD - tutorial shows how to use the full version of Volo View to view, mark up and plot dwg, dwf and other file types and how to incorporate the changes into AutoCAD, Nancy Fulton, OpenCAD, December 2, 2002

Drawing Aids - ortho, snap, grid, AutoCAD On-line Tutor

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