Question

How to edit a half sister to a normal sister

Answer 1

If by that you mean that someone is shown as a half-sister who should be shown as a full sibling, then you need to add (i.e. link to) the missing parent.  If you are not the profile manager, you should contact that person first.

Edited for clarity (thanks, Gillian).

Comments

Or connect them to their missing parent, if the parent already exists on Wikitree, rather than add a new parent.

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Yes, thank you, Gillian.  I meant add the missing parent to the profile, not to WikiTree.  The parent profile probably would already exist, and already be attached to one of the siblings.