MIDI Regions not changing with tempo changes

Hi All,
Sorry i’m back again.
When i change the tempo of my track, the MIDI regions, instead of adapting to the new tempo, they just stretch out and still play at the tempo they were recorded at.
I’ve did a bit of research on google and it says in a video i found that MIDI regions should automatically adapt to the new tempo and you only have to use musical mode for audio.
This is not happening however.
What could be causing this to happen? I can’t seem to find a musical mode equivalent for the MIDI.

Resolved. There was a button to change between linear and musical time base. Thanks Facebook forum x