How Do I Extend a Line in Another Line in SketchUp?

Are you struggling to extend a line in another line in SketchUp? Don’t worry; we’ve got you covered! In this tutorial, we’ll walk you through the step-by-step process of extending a line within another line using SketchUp’s powerful tools.

Step 1: Select the Line Tool

To begin, select the Line tool from the toolbar on the left side of your SketchUp window. You can also use the keyboard shortcut “L” to activate this tool quickly.

Step 2: Draw Your First Line

With the Line tool activated, click anywhere on your workspace to start drawing your first line. Click again to set the endpoint of this line. You can input specific values for its length and orientation in the Measurements box at the lower-right corner of your screen.

Step 3: Activate the Move Tool

Next, activate the Move tool. You can find it in the toolbar or use its keyboard shortcut “M”. With this tool selected, click on one endpoint of your first line and drag it towards where you want to extend it.

Step 4: Hold Down Shift

To ensure that your extended line remains aligned with your original line, hold down the Shift key. This will constrain SketchUp’s movement to a straight path along an axis.

Step 5: Snap to Endpoint or Intersection

If you want your extended line to connect precisely with another endpoint or intersect with an existing object, hover over that point until it highlights. Then, click on it while holding down Shift to snap your extended line onto it.


  • If you have trouble snapping to the desired point, you can zoom in for more precision by scrolling your mouse wheel or using the Zoom tool.
  • You can also use SketchUp’s inferencing system to help you snap your line accurately. Pay attention to the tooltips and colored guidelines that appear as you move your cursor.

That’s it! You’ve successfully extended a line within another line using SketchUp. Now you can create complex designs and accurately modify existing ones with ease.

Remember, practice makes perfect. So keep experimenting with SketchUp’s various tools and features to improve your skills. Happy modeling!