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Learn how to create and customize Alignment Styles in Autodesk Civil 3D 2026 with this easy step-by-step tutorial. This video explains how to configure alignment display settings and create professional alignment styles for road design, highway engineering, and infrastructure projects.

In This Tutorial, You Will Learn:

- How to Create Alignment Styles in Civil 3D
- Customize Alignment Display Properties
- Configure Alignment Components
- Change Alignment Colors and Line Types
- Modify Alignment Style Settings
- Apply Alignment Styles to Road Designs
- Professional Civil 3D Alignment Presentation

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Transcript
00:10Alignment styles control how alignments are displayed in your model.
00:15They define the visibility, colors, and line styles of the various parts of an alignment.
00:22Each alignment can be assigned a style, and the style can be changed at any time.
00:28For example, we often want to have a different style shown whilst we're designing our alignment,
00:33perhaps with some clear bright colors.
00:36But then when we want to plot these on a drawing, we might be using color-based plotting,
00:41and so we will change the style to show the colors for plotting.
00:45So we'd have one style for designing with, and a different style for drawing production.
00:52We're going to create an alignment style that is suitable for using whilst designing.
00:58In the Settings tab, expand Alignment, and then expand Alignment Styles.
01:05When we create new styles, we often use an existing style as a template, as it already has some
01:11of the settings we want.
01:13We're going to use the Layout style and make a copy of it.
01:17Rename your new style to Design style.
01:20You can also give it a description if you wish.
01:24We could continue to make changes in this style, but if we save it now and apply it to our
01:29alignment,
01:30then we can make changes to the style and see the result of our edits.
01:35Click OK to save the style and then apply your new style to the Sycamore Heights alignment.
01:43Go back to the Settings tab and edit your new style.
01:49In the style, there is a Design tab which defines the grip edit behavior for curves.
01:56We'll set the Radius Snap value to 10.
02:00I'm going to label the curve on the alignment so that you can see the grip edit behavior.
02:06With this set, when I make a grip edit on a curve, the grip will snap to an even 10
02:11feet radius.
02:14Back in the style, go to the Markers tab.
02:17Here you can see a list of geometry positions for the alignment and we can define markers
02:23to be drawn at those positions.
02:26I can show you the markers in the drawing and you can see that they're very small and don't really
02:32show.
02:33We need to edit these to make them visible at all drawing scales.
02:38Click on the Edit button on the Point of Intersection row for the PI Point marker.
02:44In the Pick Marker style, click on the Edit button again.
02:50In the Marker style, we'll change the Size options from Use Size in Absolute Units to Use Drawing Scale
02:57and set the units to 0.1.
03:00This will make the marker annotative and it will resize so that it's 0.1 of an inch when plotted,
03:06regardless of the scale of the plot.
03:09When I apply that to the style, you can see the marker shows in the drawing.
03:14We'll repeat this for the Alignment Geometry marker but we'll set the Size for this to 0.05.
03:22Click Apply to see these on the alignment.
03:26At the bottom of the Markers tab are the settings for an Alignment Direction arrow.
03:31In here, you can define the arrow's style and size.
03:36Set the Size options to Use Drawing Scale and set the value to 0.2.
03:42To see the arrow, go to the Display tab and turn on the arrow using the light bulb.
03:49The Fit options for the arrow control what happens if the line segment is too short.
03:54The arrow can be omitted or shrink or be forced to be drawn.
03:59Now go to the Display tab.
04:02This tab controls the display of alignment entities in different view directions, Plan, Model, 3D or Section.
04:12For each subentity, Line, Curve, etc., you can set the Visibility, Layer, Color, Line Type, Line Type Scale and Line
04:22Weight.
04:24When we turn off the visibility, we are hiding that entity in the display, independently from its layer setting.
04:33If a subentity is assigned a specific layer, we then have the option of controlling visibility by style or by
04:40layer.
04:41For Line, set the color to Yellow.
04:45For Curves, set the color to Red.
04:50And for Spiral, set the color to Magenta.
04:54This allows us to easily identify where different entities change.
05:00Using the Shift key, select Line, Curve and Spiral.
05:06Set the Line Weight for these three to 0.3.
05:11Turn off the arrow visibility as we don't want to see arrows on the alignment.
05:15Note the layer for the Line extension.
05:18We want to set the same layer for the Tangent extensions.
05:23C-Road-Line-Extension.
05:28Select all of the extensions and change the color to 253 so they're slightly lighter.
05:36Change the view direction to Model.
05:39You can see the lines, curves and spirals are set to be visible when viewing in 3D.
05:46Let me show you what this means.
05:49Here I am viewing the alignment together with the surface in the Object Viewer.
05:53You can see that the alignment is only displaying in 2D as it has no elevations.
06:00There's really not much point viewing it in 3D so in the Model view of the style, we'll turn all
06:05the visibility off.
06:08In the Section view direction, we'll only see a marker for the alignment.
06:13Set the marker color to Red.
06:16Click OK to save the changes to the style.
06:19We can now apply the style to all the settings.

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