Centerline and Center mark in AutoCAD

Centerline and Centermark in AutoCAD are relatively new features added in the 2017 version.

With the help of these tools, it’s now fairly easy to add a center mark to an arc or a circle, you can also add a center line with ease using the center line tool.

In this article, I will explain how you can leverage the benefits of these AutoCAD tools to the best possible extent, let’s start with Center Mark tool.

Center Mark

To add a center mark to a circle or arc select this tool from Centerlines panel of Annotate tab.

The cursor will change into a Pickbox, click on the circle or arc and press enter to exit the command.

You will notice that a default center mark will be added as shown in the image below.

By default, the center mark will span the complete diameter of the circle and it will remain so even when you change the radius of the circle.

When the radius of this circle is changed using grips or using properties palette the center mark will adjust it’s size to the new dimensions of the circle.

You can modify the properties of this center mark using properties palette.

Double click on the center mark to bring the quick properties palette, in the bottom of quick properties palette you will find an option for hiding the extension line.

Select No from the show extension option to hide the extension line from center mark.

The default centerline extends beyond the circle circumference.

You can change the size of this extended length from the quick properties palette or manually using grips of center mark.

Centerline

As the name suggests this tool will add a centerline in between two parallel or non-parallel lines.