Attach "unrelated' children to parents

[Tacitus]

I have several children whose provenance was initially unknown or at least not known with certainty, who I have put in the file as 'unrelated' people. I have now resolved who they 'belong' to and wish to attach them to their appropriate parents.

Is there a way I can do this - perhaps by drag and drop in the appropriate view?

At present I can't see an obvious way to do it.

[Tacitus]

I've sorted the problem thanks. I thought drag and drop from the sidebar should be OK but for some reason it wasn't working.

All is now well so I don't know what was going wrong earlier.