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I need to change the 3 dimensions of an object, but only by changing one dimension.

That is, if the object has the following dimensions:

  • height: 2 units (Z)

  • width: 0.5 units (Y)

  • depth: 0.1 units (X)

When I change the height of 2 units to 3 units, then the other width dimensions (Y) and depth (X) should automatically change to 0.75 and 0.15 respectively.

I do this by scaling (S):

  1. I press the S key
  2. I press the = key
  3. After Income Division 3/2. 3 is the new dimension and 2 above.

But I would like to know if there is a better way to do so through the properties panel (N).
The options in the properties panel, when I change the height of 2 units to 3 units, the width and depth do not change.

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  • $\begingroup$ For now I think your current approach is the best way of doing this. This should be possible with multi number button editing in the future, but there is currently a bug preventing this. $\endgroup$ – gandalf3 Jun 27 '14 at 23:27
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There is a solution since version 2.70: http://wiki.blender.org/index.php/Dev:Ref/Release_Notes/2.70/UI#Multi-Number_Button_Editing

Click and drag from the first to the last fields you want to edit and release the click. The three fields are highlighted. Enter an expression, eg. *3/2 and press enter. All fields are edited at the same time.

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    $\begingroup$ Unfortunately it doesn't quite work that way, all the selected number buttons will be changed the final result of the button being edited. This is a known limitation. Also note that if you want to do this on the dimensions, there is known bug with that too. $\endgroup$ – gandalf3 Jun 27 '14 at 23:11
  • $\begingroup$ Dragging vertically down across all 3 axis fields, then moving horizontally across the bottom one alters all 3 fields proportionally and works for every build I've tried for a couple months now. $\endgroup$ – MarcClintDion Jun 28 '14 at 14:51

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