Now, assuming that you have a clue what the Piano Roll is about, we will have a closer look at the most common features it has to offer. Recommended reading: Step Sequencer, Playlist and Piano Roll If you are not at all familiar with this view and other important views (such as Step Sequencer and Playlist), I recommend you first check out the tutorial listed below: The Piano Roll is one of the central views in FL Studio.
FL Studio tutorial explaining the piano roll view.