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I am learning Blender and just stuck on one thing. I have two Objects (A and B), A's length is 400 and B's length is 100. I want to make B's length half of A's length. like whenever I change A's length, B's length should automatically get change to its half. But I don't want to do it with python script. is there any way to put some simple code/defination/name in Blender's UI, where we manually enter object's length (under Dimensions - after clicking 'N' after selecting the object)

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is there any way to put some simple code/defination/name in Blender's UI

Indeed. It's called a Driver:

You can also use a constraint - but then you have to modify the mesh to be 4 times shorter, as the constraint copies the scale 1 to 1:

Documentation: https://docs.blender.org/manual/en/latest/animation/drivers/index.html

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  • $\begingroup$ Thank you so much Markus $\endgroup$
    – jimmy
    Jun 27, 2021 at 7:21

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