Editing The Tempo Track (Song Mode) - Yamaha QY 300 Owner's Manual

Editing the Tempo Track (SONG mode)

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The QY300 tempo track makes it easy to program sudden or gradual tempo
changes to control the "flow" of your music. To edit the tempo track either
select the "Tmp" track in the SONG mode and then press the [EDIT] key, or
use the "ChngTr" (change track) function if you are already in the edit mode.
Editing procedure is essentially the same as for the normal sequencer
tracks. To change an existing tempo parameter — location or tempo value —
simply move the cursor to the appropriate parameter, edit, and press [ENTER]
(or move to a different line to cancel the edit).
To insert new tempo values first move to the insert location, press the [F2]
function key ("Insert"), set the tempo value, and press [ENTER].
Press the [F6] function key ("Exit") to return to the tempo change edit mode,
and then again to return to the SONG mode.