Question on laying Atlas flex track

[jefelectric]

I'm helping a grandson with his HO layout. We have a question. When laying Atlas flex track on curves is there a preferred way to bend it? Should the movable rail be on the inside or outside of the curve? The last time I laid HO flex track it was made with fiber tie strip, so it's been a while.

I did a search and didn't find anything on this subject.

Thanks,