Hello, all, In old GSAS, we can restraint some bond length by Restraints tab. How to fulfill the function in GSAS II? Regards, Shanke IGGCAS, China -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mailman.aps.anl.gov/pipermail/gsas-ii/attachments/20210601/7bac7dc4/attachment.html>