hi raju,
2 ways to do what you want:
one IS with markers.
you can extend makes so they have a duration
ad a marker, go to hewer you wan to extend it to, hit option `
(the ` key under the escape key does lots of marker things – look them up in the marker menu)
just a head up that i have experience extreme slow-down of FCP, when using extended markers in the timeline AND zooming in.
so, ok when you;re out wide, but when you zoom right in the timeline gets really slow with extend markers.
one way to deal with that is to turn marker visibility off in the Project Properties (edit menu)
this can be a drag, especially as you;l have different coloured markers.
or maybe you’d prefer suggestion two:
add some text over the whole song, blade it up and name / colour the different sections
colour clips in modify menu > label.
you’ll see the keyboard shortcuts in there, and it pays to use them.
LOCK that track course :
and turn it’s visibility off.
cheers,
nick