Rekordbox Dj feature "Tempo Matching Display"(Serato), "Beat Matching Display" (Trackor)

Maybe it exist and I haven't found the setting. Serato and Trackor have a feature that makes mixing music with an inconsistent beat, or a song that changes tempo, much easier. If this feature exist how do I turn it on, and if not can you please develop it? I will switch from Serato to Rekordbox in a second.

Thanks,

Dj Greg Gee