Logic Pro X Beat Mapping checkbox greyed out

when I open Global Tracks there’s a list of checkboxes for various functions, but the Beat Mapping one is greyed out and I can’t turn it on. I just started using Logic X (I’ve been using Logic 9 and started with Logic 3.5 several decades ago), so I have some background knowledge. A lot of things seem different in X though, so I’m probably just overlooking something obvious (?)..thanks in advance!
okay, the switch to turn it on is hidden in one of the drop-down menus..kind of had to find it by accident, as it didn’t show up in the “help” section
go to edit/tempo/show beat mapping track..then when it’s showing, hover over “beat mapping” and you can analyze transients. I’ll try to attach a photo or two.