How do I set the pivot to the exact position as parent object?

I am trying to make a UI child element scale uniformly to its parent and also retaining the exact positioning relative to its parent. It seems the solution is if I place the child's pivot to the exact pivot position of its parent and anchors are at the corner of the child UI. The problem is I can't make the child's snap to the exact position of its parent.

Pivot doesn't seem to snap to grid, maybe my settings for snap are wrong?

I can't put it exactly on the parent's pivot, is a way in editor that I can do that?

Maybe there's an easier way to do that, like the anchor presets?