What is the ʼProjectʼ tool (shortcut P) in a sketch in Autodesk Fusion?
Short Answer
The Autodesk fusion sketch Project tool copies edges, faces, points, or sketch geometry into the active sketch as linked reference geometry. The most common professional method is to use Project with the Projection Link option enabled so the sketch updates with model changes. Limitation: projected geometry can fail if the source changes significantly.
What You Need to Know Before
Warning: projected sketch geometry is often associative, so deleting or heavily editing the original edge or face can create broken references in your sketch. This is especially common after timeline edits, feature reordering, or replacing faces with different topology.
How to Use the Project Tool in Autodesk Fusion
Command: Project
Shortcut: P
Quick Steps:
- Edit or create a sketch, then go to the Sketch tab > Create panel > Project/Include > Project.
- Select the edges, faces, points, or sketch geometry you want to project into the active sketch.
- Keep Projection Link checked if you want associative updates, then click OK.
Variables & Settings
Key Setting: Projection Link toggle
- Expert Setting: when Projection Link is on, the projected geometry stays linked to the original model geometry and updates when the source changes. Turn it off only when you need independent sketch references that will not follow later model edits.
Why it Fails
- Cause 1 (Geometry): the source edge or face was deleted, split, merged, or replaced, so the projected reference no longer has a valid parent.
- Cause 2 (layers/Locks): you are trying to select geometry from the wrong active component, or visibility/selectability settings make the needed body or sketch hard to pick.
- Cause 3 (Command/Logic): the projection was created with Projection Link enabled, but later timeline changes altered the source topology, breaking the associativity.
Quick Fix & Best Practice
- Quick Fix: edit the sketch, delete the broken projected entities, then run Project again with the correct source geometry and confirm the Projection Link setting.
- Manager’s Verdict: use Project as the default professional method for referencing existing model geometry in sketches, but avoid over-projecting unnecessary edges because too many linked references make models harder to maintain.
FAQ
Can the Project tool copy 3D model edges into a 2D sketch?
Yes, it projects selectable model geometry into the active sketch plane.
What does Projection Link do in Autodesk Fusion?
It keeps the projected sketch geometry associated with the original source geometry.
Why is my projected geometry purple?
Because Fusion displays projected reference geometry in purple by default.
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