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|  Re: How to constrain the z axis ? ( No.1 ) |  |  Date: 2023/12/09 12:44 Name: Naoya Yamaguchi
 
Hi,
 You can use `RFC6` or `OptC6` for the purpose (cf. https://www.openmx-square.org/openmx_man3.9/node54.html).
 
 Regards,
 Naoya Yamaguchi
 |  |  Re: How to constrain the z axis ? ( No.2 ) |  |  Date: 2023/12/11 00:33 Name: YaoShunWei  <yao_sw@163.com>
 
Dear Dr Naoya Yamaguchi
 Thank you very much for your suggestion, I will try it.
 
 Regards,
 Yao ShunWei
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