Change tempo in arrangement view automation

[Dextroze]

Hello guys,

I can't change the tempo in arrangement view. I watched a tutorial and apparently all I have to do is to unfold Live's Master track and start automate things but here's a screenshot of my master unfold... There is nothing here !! Why ???
And in comparison what's is supposed to be there according to the Ableton help page.https://ibb.co/SXLJrb4 ME <
https://help.ableton.com/hc/article_att ... .52.54.png < What's supposed to happen

[wearemindflux]

You need to be be in track automation mode, simply press A (as long as computer keyboard mode is not engaged)

[Dextroze]

Thank you man !!!