Synchronizing cursor location between Edit and Preview modes

Hi, I was looking at a group of similar FRs. This one is a bit confusing.
In preview there’s no cursor, so at the moment we try to

have whatever is at the top of the preview be at the top of the edit screen when switching modes.
and
if there was cursor position previously in edit, have the cursor there (not the page page there, the cursor there).

I am gonna close this FR.
This is better one for the problem you are feeling, post here