How to Double-Time/Half-Time BPM quickly

How to Double-Time/Half-Time BPM quickly

I was wondering if there’s a fast way to halve or double a track’s BPM quickly in Traktor, e.g. changing a track’s tempo from 160 BPM to 80 BPM on the fly. I know you can go into the Grid menu and mouse click things but is it possible to do with with an S4/S8 controller? Thanks in advance.

You can use this buttons from controller. You must activate midi controls, like on my videos…
I think, after watching, You understand how to do that…