Hey @DenisChenu, I see that you can set position of the question in old editor 6.x if you copy a question for example. Do you mean there is no option to set it when you create a new question?

Yes :
3.X : create a new question : you can set position : screenshot came for 3.X
6.X : create new question : Choice of Question group, but not position inside this group

In 3.X : position was updated via ajax (see screencast)

This is intentionally omitted in the new editor (React one), so I don't know if it makes sense to "fix it" in the old editor.
Maybe we will add this feature in another form later down the road.

This is intentionally omitted in the new editor

Intentionally ? What reason ? If it's intentionally : there are a reason.

Limesurvey Leaks:
We are working on a right mouse click menu in which a function like this could be implemented.