- Introduction
- Creating a New Drawing
- Model Space and Layout Space
- Communicating with AutoCAD
- Object Snaps, Ortho Mode, and Polar Tracking
- Undo/Redo
- Grid and Snap
- Draw a Circle
- Navigating Around the Drawing
- Object Properties
- Layers
- Dimension Styles
- Dimensioning
- Modifying Drawing Objects
- Grip Editing
- Introduction to Advanced Editing Techniques
- Cleaning Up Layout Space
- Plotting and Page Setups
- Chapter Summary
- Chapter Test Questions
Dimension Styles
Now that you have created a basic drawing, it’s time to dimension it. Before we start dimensioning, we need to set up the appearance of the dimensions to reflect industry standards. The look and behavior of dimensions are controlled through dimension styles. A dimension style is simply a collection of dimension settings saved with a certain name. A dimension object takes on the look and behavior of its dimension style. AutoCAD uses a dimension style called Standard as a default, but you can modify the Standard dimension style or create new ones as needed. In the following exercise, you’ll take a quick tour through some of the various dimension style settings.
Due to the sheer number of options, modifying and managing dimension styles can be one of the more challenging aspects of AutoCAD. As with layers, managing dimensions and dimension styles is a crucial element of using AutoCAD effectively.
Select the Annotate tab of the ribbon to display the different annotation tools.
Choose the Dimension Style tool from the Dimensions panel by selecting the down arrow on the right side of the panel title bar, as shown in 

Choose the Modify… button to modify the Standard dimension style. The Modify Dimension Style dialog box appears (see 
Choose the Symbols and Arrows tab and change the Arrow size value to .125. In the Center marks area, change the type to None (see 
Choose the Text tab and change the Text height value to .125 (see 
Click on the down arrow to the right of the Text style: drop-down list and select the Roman text style (see 
Choose the Fit tab and turn on the Annotative option (see 
Choose the Primary Units tab and select 0.00 from the Precision drop-down list (see 
Choose OK to close the Modify Dimension Style dialog box.
Choose Close to close the Dimension Style Manager dialog box.
Save your drawing.