Is there any way to show the current wrap margin in the editor as a vertical line?

Thanks.

Well sort of. But you have to set a column marker yourself. In UE14 set a column marker at your column of choice using View - Set/Show column Markers....

If you use different wrap margins depending on extention (Advance - Configuration - Editor - Word wrap/Tab settings), you have to switch column marker yourself.

That works for me!

Thanks.