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Is it possible to set the default size of the Empty Object? The problem is since I switched my blender scale to metric, the Empty's default size is kinda large for most times I need it.

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Directly after you add an Empty press F6 to get the Add Empty Operator parameters.

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The Radius parameter will set the visual size of the current Empty and all new Empties that you add afterwards during that session.

Unfortunately there isn't a configuration option to set the default radius permanently.

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  • $\begingroup$ possibly a script could be told to load on each new .blend file to add an empty and set the radius and remove it (all behind the scenes) -- but simply setting the Radius once is almost effortless too.. $\endgroup$ – zeffii Dec 1 '15 at 8:28
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When adding an empty from the add object menu, change the radius to the setting you desire. The inverse of the scene unit settings scale_length will give you a result of 1m

This can also be edited on the empties data panel.

The following changes all empties to 1 based on the scale_length.

import bpy
context = bpy.context

scene = context.scene

scale_length = scene.unit_settings.scale_length
empties = [o for o in scene.objects if o.data is None]

for empty in empties:
    empty.empty_draw_size = 1 / scale_length

or calling the operator

bpy.ops.object.empty_add('INVOKE_DEFAULT', radius=1 / scale_length)

using invoke default keep that value for the next time the operator is run.

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  • $\begingroup$ sorry if this sounds just dumb, but can you tell me where to find that bit of script? $\endgroup$ – Bellini Dec 1 '15 at 8:14
  • $\begingroup$ To run the script, copy, paste into a new text block, right-click "run script". $\endgroup$ – batFINGER Dec 1 '15 at 8:30

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