Do you simple want to flip (L) a few components?
No the component is on the correct side but the comment text is on the opposite side.
Anyway I found out how to do it using the following query which highlights the comment text on the top overlay for components mounted on the bottom.
(InComponentClass('Bottom Side Components') AND IsText AND OnLayer('TopOverlay'))
It's not as obvious and user friendly as 99SE in this respect.