Hello,  I have an X-ray structure where I want to model some loop regions. However, while modeling these loops, I do not want to either optimize or refine them. How should I proceed for that?  Any help would be appreciated. ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍
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Hello, 

I have an X-ray structure where I want to model some loop regions. However, while modeling these loops, I do not want to either optimize or refine them. How should I proceed for that? 

Any help would be appreciated.