Custom Livery's On Timetable Mode

It says I can use custom livery's on timetable mode but it just uses the normal livery set on the trains for that route,

 

When selecting train to use press “x” and select it’s livery

if “x” don’t work on a train it will be cause it doesn’t have the option for access to different livery’s

 

Thank you, that worked, doesn't show the control for that, for me anyways, thanks again big help.