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CADTutor provides the best free tutorials and articles for AutoCAD, 3ds Max and associated applications along with a friendly community forum. If you need to learn AutoCAD, or you want to be more productive, you're in the right place. See our tip of the day to start learning right now!
Free Tutorials and More…
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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Uploading Files with WS_FTP
This tutorial guides you through the process of uploading your website files to a web server using the WS_FTP client. Format: Text/Image
Last visited: less than one minute ago
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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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Creating Custom Bitmap Materials
This tutorial demonstartes how to create your own bitmap based materials using Photoshop and AutoCAD. Format: Text/Image
Last visited: 1 minute ago
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Paper Space Exercise
AutoCAD's paper space mode is a bit like having a page in a scrapbook onto which you can paste different views of your AutoCAD drawing. This whole page can then be plotted. This exercise demonstrates how. Format: Text/Image
Last visited: 3 minutes ago
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Object Snap
A tutorial giving an overview of all the AutoCAD object snaps (osnaps) with some worked examples. The tutorial also covers the use of temporary tracking points and object snap tracking. Format: Text/Image
Last visited: 3 minutes ago
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AutoLISP Quick Start
This tutorial is designed to help AutoCAD users get to grips with AutoLISP quickly. It demonstartes how to create AutoLISP routines from a standing start. Format: Text/Image
Last visited: 4 minutes ago
CADTutor Tutorials
Our tutorials are comprehensive but straightforward introductions to AutoCAD and related software. They are designed to help beginners get to grips with design workflows as quickly as possible. There are over 100 to choose from, some text/image based and others in video format. Whatever stage you are at in your learning, you should find a tutorial to help.
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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
Original Dimension Value
From: AutoCAD Productivity Articles #143
Originally published: December 2015
Since the dimension text of an associative dimension is Mtext, double-click anywhere on an associative dimension and you can add additional information… or modify the value to what you want.

But what if you want to put the dimension back to the original value?
Insights:
If you reposition an extension line origin grip of a dimension and the value doesn't change, the original value was modified.
If you double-click a dimension and the edit box has a white background — not blue — the original value was modified.

Solution:
Double-click the dimension, then put the less-than and greater-than characters in the dimension box, like this… <>
The original value will be restored.
See all the articles published in December 2015
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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25th – 31st May 2026
This week's image is by Steven Leech
Software used: AutoCAD 2009
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Last Week's Image
Last week's image is by JRevit
Software used: Revit 2009
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Two Weeks Ago
This image is by Lazarus
Software used: AutoCAD 2009
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Three Weeks Ago
This image is by abstracted
Software used: Inventor and 3ds Max
Gallery of Work
Over the years, our forum members have contributed hundreds of images, showcasing their amazing work. The images above are just a small selection that demonstrate the wide range of project types our community is involved with. Take a look at our gallery to see all the images published in the last 12 months.
Tip of the Day
Layer States and Viewports
Did you know that Layer States can be saved and used to control visibility of layers per viewport? If you create and save a couple of layer states within an active viewport, you can then toggle them back and forth without affecting any other viewports, or model space. The changes only occur within the active viewport.
Try this:
Create a bunch of random objects in model space on different layers. Now switch to paper space and create two viewports so that you can see all the model space objects in both viewports. Now activate one of the viewports and open the Express Tools LMAN layer states manager. Create and save a new layer state. Now close LMAN and freeze some of the objects within the viewport. Open LMAN back up and create another new layer state. All of this must be done within the active viewport. You can now toggle back and forth between the two layer states within the active viewport without affecting model space or any other viewports. You can also switch to another viewport and use the same layer states on it, or create new ones.
Missed a Tip?
Did you miss yesterday's tip? Maybe you forgot to drop by or maybe you don't visit over the weekend. If so, you can now see all the tips published during the past week. Also, if you have a tip you'd like to share with us, you can post it on our forum and if we like it, we'll publish it here.