Is the ʼDefaultʼ layer permanent or can it be deleted in Rhino?

ByCADbrief Staff

Short Answer

No, the Default layer in Rhino cannot be deleted while it is the only required base layer in the file. The standard professional method is to keep Default and move objects to another layer using the Layer panel before organizing or purging the file. It must always leave one current layer available.

What You Need to Know Before

Warning: If objects, blocks, or imported geometry still live on the Default layer, deleting other layers first can leave your file poorly organized and harder to audit later. A common failure is trying to remove Default when it is still the current or only remaining layer.

How to…

  • Command: Layer

  • Shortcut: F7

  • Quick Steps:

    1. Open the Layers panel with F7 or run Layer.
    2. Create a new layer, then right-click it and choose Set Current.
    3. Move any objects off Default, then keep Default unused or purge other empty layers as needed.

Variables & Settings

  • Key Setting: Current layer

  • Expert Setting: Rhino always requires one active current layer in the model. If Default is current, switch another layer to current first; otherwise layer cleanup options will stay limited.

Why it Fails

  • Cause 1 (Geometry): Objects, annotation, or block contents are still assigned to Default.
  • Cause 2 (Layers/Locks): Default is the current layer, or it is the only remaining top-level layer in the file.
  • Cause 3 (Command/Logic): Rhino layer logic requires at least one layer to remain, so the base Default layer cannot simply be removed in a normal file state.

Quick Fix & Best Practice

  • Quick Fix: Use Layer, create a new layer, set it current, and move all objects from Default to that new layer.
  • Manager’s Verdict: In professional Rhino workflows, keep Default as a fallback or intake layer for imports, but avoid modeling production geometry on it long term.

FAQ

Can I rename the Default layer in Rhino?
Yes, in many Rhino workflows you can rename it unless file standards or references restrict it.

Can I move objects off the Default layer quickly?
Yes, select the objects and assign them to another layer in the Properties panel or Layers panel.

Does Purge remove the Default layer?
No, Purge can remove unused layers, but not the required base layer if Rhino must keep one active layer.

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