AutoCAD 2026 Construction Line (XLine) command details with 3 examples

The Revision Cloud command is quite customisable according to the revision requirements and aids in identifying parts of the design where updates or modifications have been performed.

Command: XLINE

Syntax:

1. XLINE: Starts the construction line command.
2. You can choose from several options when creating construction lines:
   • Horizon: Draws a horizontal construction line.
   • Vertical: Draws a vertical construction line.
   • Angle: Draws a construction line at a specific angle.
   • 2 Points: Draws a construction line between two points.
   • 3 Points: Draws a construction line that passes through three points.

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Example 1: Drawing a Horizontal Construction Line

1. Type XLINE in the command bar.
2. Choose the Horizon option or type H.
3. Click anywhere in the drawing area or specify a point to place the line.
4. The line will extend infinitely in the horizontal direction.

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Example 2: Drawing a Construction Line at an Angle

1. Type XLINE in the command bar.
2. Choose the Angle option or type A.
3. Specify the starting point for the line.
4. Input the angle (in degrees) you want the line to have. For example, typing 45 will create a line at a 45-degree angle.
5. The line will extend infinitely at the specified angle.

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Example 3: Drawing a Construction Line Through Two Points

1. Type XLINE in the command bar.
2. Choose the 2 Points option or type 2P.
3. Click two points in the drawing area. The construction line will pass through these points, extending infinitely in both directions.

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Additional Tips:

You can erase construction lines with the ERASE command when they are no longer needed.

Construction lines are not printed, so they won’t affect the final output.