Create Dimensions Quickly with Osnaps — Dave Couch — This LISP file contains three separate functions that the tip author uses for dimensioning residential and commercial site plans in AutoCAD — although the uses for these routines do not stop there.

Remove Background Masking from Mtext — Leland Leahy — This simple but powerful LISP routine will remove the background mask from all mtext in an AutoCAD drawing.

Generate a Layer List by Selection — Matt Sibum — Matt's latest routine generates a list of layers on which a selection set of AutoCAD entities resides; this allows you to check a certain area of a drawing for layer compliance.

Align MText Vertically or Horizontally — Matt Sibum — Matt's second routine for the month will allow you to align multiple blocks of mtext in AutoCAD — horizontally or vertically — all in one step.

Find the Centers of Triangles — Kent Cooper — An expansion of Cadalyst CAD Tip No. 3830, this routine that allows you to select a triangular closed polyline in AutoCAD. Moreover, this routine enables you to find any of the various "centers" of a triangular object.

Offset Command with Running Options — Kent Cooper — In this tip, Kent adds some features to a classic tip — an improvement on the AutoCAD Offset command. Kent's version allows for changing the offset distance without leaving the command, and also restores changed system variables and includes an error handler.