Id like to be able to put different tempos/time changes in my piece.

How Do i do this on FL? for example bars 1-3 will be on 60bpm and the next bars 145bpm. Also how do I change time signatures?

From FL noob

and also time sigs is all about how you place the beats. create a track with 3 sets of beats instead of the standard four to get 3/4. FYI, this isn't really the best place for these questions, i recommend riffs and recordings.