AutoCAD and AutoCAD LT 2018
Autodesk has released AutoCAD 2018 and AutoCAD LT 2018 simultaneously. Not surprisingly,they’re nearly identical in the way they look and work. You can share files between the two pro-
grams with complete confidence that you won’t lose data or corrupt files. The main differences
are that AutoCAD LT doesn’t support all of the 3D functions of AutoCAD 2018, nor does it sup-
port the customization tools of AutoLISP® or the .NET Framework. But AutoCAD LT still has
plenty to offer in both the productivity and customization areas. Because they’re so similar, we
can present material for both programs with only minor adjustments.
When a feature is discussed that is available only in AutoCAD 2018, you’ll see the AutoCAD
Only icon. For the purposes of this publication, the “ACAD only” icon means that the relevant
(or adjacent) content applies only to AutoCAD software and not to AutoCAD LT software.
You’ll also see warning messages when tutorials vary between AutoCAD 2018 and AutoCAD
LT. If only minor differences occur, you’ll see either a warning message or directions embedded
in the exercise indicating the differences between the two programs.
We’ve also provided workaround instructions wherever possible when AutoCAD LT doesn’t
offer a feature found in AutoCAD 2018.
Getting Information Fast
In each chapter, you’ll find extensive tips and discussions in the form of sidebars set off fromthe main text. These provide a wealth of information that we have gathered over years of using
AutoCAD on a variety of projects in different office environments. You may want to browse
through the book and read these boxes just to get an idea of how they might be useful to you.
Another available quick reference is Bonus Chapter 4, “System Variables and Dimension
Styles.” It contains descriptions of all the dimension settings with comments on their uses. If
you experience any problems, you can consult the section “When Things Go Wrong” in Bonus
Chapter 3, “Hardware and Software Tips.”
The Mastering Series
The Mastering series from Sybex provides outstanding instruction for readers with intermediate
and advanced skills in the form of top-notch training and development for those already work-
ing in their field, and clear, serious education for those aspiring to become pros.
Every Mastering book includes the following:
◆ Skill-based instruction with chapters organized around real tasks rather than abstract con-
cepts or subjects
◆ Self-review test questions so that you can be certain you’re equipped to do the job right
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