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In edit mode, you can't delete materials or shape keys. If you switch to object mode, it works fine. Why? Is there a specific reason that these can't be deleted in edit mode?

I'm using Blender 2.8.

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  • $\begingroup$ In edit mode you are working on a "state copy" that is read from and written back to object data on edit mode toggle. Both shapekey and material slot removal are object level operators. Similarly for applying modifiers. $\endgroup$ – batFINGER Feb 16 at 12:52
  • $\begingroup$ docs.blender.org/api/current/… $\endgroup$ – batFINGER Feb 16 at 16:46
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Yes there is a small reason behind this. This happens because when we remove a shape-key object's vertex data is changed to the current shape-key state which have to be rcalculated so for removing lags or software crash. That's why you can't delete shape key in edit mode. Whereas in concern to the materials the can be applied, removed and added in edit mode. If you are unable to do this it means that you are not currently having an active material slot available you will have to add and leave a material slot empty on order to create materials and make a material in order to apply then on your mesh.

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