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The Tutorials section provides over 100 original tutorials for AutoCAD, 3ds Max and other design applications. Michael’s Corner is an archive of productivity articles that brings you the best AutoCAD tips and tricks. Our Forum is a lively community where AutoCAD users can ask questions and get answers. The Downloads area provides free AutoCAD blocks, free AutoLISP routines and free images.
Tutorials of the Moment
Recently viewed tutorials
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Cameras
Cameras are the main viewing tools in 3D visualisation. This tutorial demonstartes how to create and control cameras. Format: Text/Image
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Dimensioning
This tutorial describes the options and commands available for dimensioning drawings and how to use them. The correct use of AutoCADs dimension tools is the key to producing clear and concise measured drawings. Format: Text/Image
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Drawing Aids
All about drawing aids. Format: Text/Image
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Site Layout Exercise 2
This exercise is designed to progress your skills in 2D drafting and to test your understanding of layouts and printing to scale from paper space. Format: Text/Image
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Units and Scales
If you're asking yourself "what scale do I draw in?" or "what units should I use?", you need this tutorial. Format: Text/Image
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ISO Paper Sizes
There has alwas been some confusion over the size of standard ISO drawing sheets with AutoCAD.The stated sizes in the plot dialogue box are not the true ISO sizes. This tutorial explains why and how to plot to scale from Model Space. Format: Text/Image
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CADTutor Forums
Our forum is a vibrant community of experts and beginners. The main focus is helping beginners get to grips with AutoCAD and to help more advanced users become more productive. The AutoLISP forum is one of the busiest out there, providing expert advice for busy professionals.
AutoCAD Productivity
UCSICON Options
From: AutoCAD Productivity Articles #146
Originally published: June 2016
Every five years or so I address the UCS icon, so here's your next installment.
General Insights
There is a UCSICON command with these options:
Right-click on the UCS icon to display a shortcut menu with a Properties option where you can dress it up a bit.
When you are in the 2D Wireframe visual style, the UCS icon looks like a stick figure. In any other visual style, the icon is a bit more colorful and 3D looking.Horses can only breath through their nose. [Just checking to see if you're paying attention.]
Click on the UCS icon and you see a square grip at 0,0,0 and round grips at the ends of the axes.To disable the ability to select/click on the UCS icon, set the variable UCSSELECTMODE to <0>.
Note: There's an article on how to dimension 3D objects in Michael's Corner, January 2013. You will find more information on manipulating the UCS icon in that review, too.
See all the articles published in June 2016
Michael's Corner
Between 2003 and 2016, Michael Beall (and one or two guests) wrote almost 600 articles for CADTutor. The focus of these articles is AutoCAD productivity, and although some of them are now more than a few years old, most remain relevant to current versions of AutoCAD. The article above is just one example. Check out Michael's Corner for a full listing.
Image of the Week
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1st – 7th December 2025
This week's image is by mehiar
Software used: 3ds Max
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Last Week's Image
Last week's image is by Titi95
Software used: AutoCAD 2014
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Two Weeks Ago
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Software used: AutoCAD 2015 and Keyshot
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Tip of the Day
Absolute and Relative Coordinates
| Coordinate | Interpretation |
|---|---|
| 25,75 | depends on context |
| @25,75 | relative |
| #25,75 | absolute |
It used to be very simple. Enter a coordinate and AutoCAD interpreted it as an absolute coordinate. Enter a coordinate preceded by "@" (the at sign) and AutoCAD interpreted it as a relative coordinate. This simple rule changed when dynamic input was introduced and now the interpretation of coordinates is contextual. For example, when you draw a rectangle using RECTANG, the coordinate for the second point is interpreted as absolute with dynamic input turned off and as relative with dynamic input turned on. Really, try it and see.
Fortunately, there's a new coordinate prefix that forces an absolute coordinate, even when AutoCAD decides you want a relative one. Precede any coordinate with "#" (the hash sign) to force an absolute coordinate.
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