Hi all d 9 != * 1 + (>L:EICAS pages, number) scrolls pages to 9 then back to 1. How do you reverse it, so start at 9 or below and scroll through to 1 then back to 9.

Hi Paul,This is the reverse "bool math" formula:(LVar) -- d 1 < 9 * + (>LVar)Tom

Tom Thanks again it works OK. I also changed it a bit to use in my FMC legs pages It scrolls through the pages as they reduce during the flight. (L:ManScroll,number) 6 - d 0 < (@c:FlightPlanWaypointsNumber) (@c:FlightPlanActiveWaypoint) - 6 / ceil 6 * * + (>L:ManScroll,number) } Paul