Yamaha MONTAGE 6 Supplementary Manual page 10

Tempo Settings
Added a setting for keeping the current tempo after switching to a different Performance.
[UTILITY]  [Tempo Settings] or [SHIFT] + [ENTER]
Operation
or
TEMPO SETTINGS icon
Global Tempo
When set to OFF, the tempo changes according to the Performance tempo. When set to ON, the current tempo is retained even
after switching to a different Performance.
Settings: Off, On
MONTAGE Supplementary Manual
Global Tempo
10