The fastest way to cut overlapping or protruding lines in AutoCAD is the Trim (TRIM) command.

目次

• Speed Up Your Drafting with the Trim Command
• How to Activate the Trim Command
  • Option 1: Via the Ribbon (Home Tab)
  • Option 2: Via Command Line (Recommended)
• Basic Steps to Trim Lines
• How to Use Advanced Trim Options
  • Accessing the Options Menu
  • 1. Fence Option
  • 2. Crossing Option
  • 3. Project Option
  • 4. Edge Option
• Try the "Select All" Shortcut
• Hold Shift to Extend Lines
• Master the Trim Command for Faster Drafting
• Convert and Share Your Cleaned-Up CAD Files Seamlessly

Speed Up Your Drafting with the Trim Command

Instead of manually dragging line grips—which is tedious and prone to errors—the Trim tool allows you to select a cutting edge and instantly slice away the excess parts of intersecting objects.

Here is exactly how to use the Trim command, along with advanced options to speed up your drafting workflow.

How to Activate the Trim Command

Option 1: Via the Ribbon (Home Tab)

Navigate to the Home tab > Modify panel > click Trim.

Option 2: Via Command Line (Recommended)

Type TRIM (or the shortcut TR) directly into the command line or workspace and press Enter.

Basic Steps to Trim Lines

1. Select the Cutting Edge: When prompted to "Select objects," click the line or object you want to act as the boundary (the selected object will highlight).
   
2. Press Enter to confirm the boundary.
3. Select the Object to Trim: When prompted to "Select object to trim," hover over the excess line to see a preview, then click to cut it.
   
4. Continue clicking any other overlapping lines you want to remove.
   
5. Press Enter or Esc to end the command.
   

How to Use Advanced Trim Options

The AutoCAD Trim command offers several built-in options—primarily different selection methods—to help you handle complex linework efficiently. Here is a breakdown of five key ways to use them.

Accessing the Options Menu

1. Follow the "Select objects" prompt and click the line you want to act as your cutting boundary.
   
2. Check the command line. The available sub-options will appear, allowing you to choose the best selection method for your specific drafting task.
   

1. Fence Option

The Fence option allows you to draw a temporary line path. Any object that this fence crosses will be trimmed automatically.

1. When prompted to "Select objects," click the red circle to define your cutting boundary.
   
2. Press Enter to confirm your selection.
3. When prompted to "Specify first fence point," draw a line that intersects the objects you want to trim.
   
4. Press Enter twice to execute the command and finish.
   

2. Crossing Option

Similar to Fence, the Crossing option lets you draw a rectangular selection window. Any line that touches or falls inside this rectangle is trimmed.

1. When prompted to "Select objects," click the red circle to define it as your cutting boundary.
   
2. Press Enter to confirm your selection.
3. When prompted to "Specify first corner," draw a crossing selection window (a rectangle) over the objects you want to trim.
   
4. Press Enter to finish the command.
   

3. Project Option

Primarily used in 3D modeling, this mode allows you to trim objects that don't physically intersect in 3D space by changing the view projection.

4. Edge Option

By default, lines must physically touch to be trimmed. The Edge option allows you to extend the boundary line to a virtual intersection.

For more on virtual intersections, check out our guide: How to Use the Extend Command in AutoCAD.

Try the "Select All" Shortcut

There is another method where you don't manually select a cutting boundary. By skipping the boundary selection, AutoCAD treats every object in your drawing as a cutting edge. This is the fastest way to trim a line to the nearest intersecting object.

1. When you see the prompt to "Select objects," press Enter immediately.
2. With all objects now acting as boundaries, click the object you want to trim.
   
3. Press Enter to finish the command.
   

Hold Shift to Extend Lines

You can actually use the Extend command while the Trim tool is still active (and vice versa). Not having to constantly cancel and switch between commands is a massive time-saver.

1. Follow the "Select objects" prompt and choose your boundary object.
2. Hold down the Shift key and click the object you want to extend.
3. Press Enter to finish the command.

Master the Trim Command for Faster Drafting

he Trim tool is arguably one of the most frequently used commands in any CAD designer's daily workflow. By mastering these techniques and shortcuts, you can eliminate tedious manual edits, keep your linework clean, and significantly speed up your overall drafting process.

Convert and Share Your Cleaned-Up CAD Files Seamlessly

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