How to Stretch One Part of a Shape Without Moving the Rest in AutoCAD

Short Answer

Yes — in AutoCAD, the most common way to stretch one part of a shape without moving the rest is to use the STRETCH command with a crossing selection. This moves only the vertices and segments inside the crossing window. It only works properly on eligible objects and selected grips.

What You Need to Know Before

Warning: If your crossing window includes the whole object instead of only the end or portion you want to change, AutoCAD may move the entire object rather than stretch it. Locked layers, blocks, and some object types can also prevent the expected result.

How to Stretch One Part of a Shape Without Moving the Rest in AutoCAD

• Command: STRETCH

• Shortcut: S

• Quick Steps:

  1. On the Ribbon, go to Home tab > Modify panel > Stretch, or type S and press Enter.
  2. Use a crossing window or crossing polygon to select only the part of the shape you want to stretch; the crossing selection must touch the vertices or edges to be modified.
  3. Press Enter, pick a base point, then pick the second point or enter a displacement distance. Keep Ortho Mode or polar tracking on if you need controlled movement.

Variables & Settings

• Key Setting: Ortho Mode / Polar Tracking

• Expert Setting: Turning on Ortho Mode (F8) constrains the stretch direction to horizontal or vertical, which helps prevent accidental skewing. Polar Tracking (F10) is better when stretching at fixed angles.

Why it Fails

• Cause 1 (Geometry): The crossing selection does not include the actual vertex or endpoint that needs to move, so nothing stretches or the wrong segment changes.
• Cause 2 (Layers/Locks): The object is on a locked layer, or it is inside a block or external reference, so the geometry cannot be edited directly.
• Cause 3 (Command/Logic): A normal window selection was used instead of a crossing selection, causing AutoCAD to select the whole object instead of stretching part of it.

Quick Fix & Best Practice

• Quick Fix: Restart STRETCH and make sure you use a green crossing window that only captures the portion to modify, not the full object.
• Manager’s Verdict: Use STRETCH for quick 2D edits to lines, polylines, and similar drafting geometry. Avoid it for block content, constrained geometry, or cases where editing grips or block parameters is more controlled.

FAQ

Can I stretch part of a polyline in AutoCAD?

Yes, if your crossing selection includes the polyline vertices you want to move.

Why does AutoCAD move the whole object instead of stretching it?

You likely used a regular window selection or selected the entire object.

Can I stretch objects inside a block?

Not directly; you need to edit the block with BEDIT or explode it if appropriate.

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