While the option to "show visualizer" exists for the Main Panel of the "Now Playing" layout, which shows the "centered frequency" style spectrum, is it possible to add the option to show the spectrum visualizer, and ability to choose "low to high frequency" option, at the base of the right sidebar (Playing Tracks) in that layout?
Said options already exist for the right sidebar in the main MusicBee Panels Configuration layout, and when enabled work fine in other Library displays (Music, Radio, etc.) yet not in Now Playing's right sidebar.
Using MB 3.1.6510