Arranging : Time, Tempo, Meter, Key, and Chords : Editing Tempo Events in the Tempo Editor : Selecting Tempo Resolution (BPM Rate)

Selecting Tempo Resolution (BPM Rate)
The Tempo Editor lets you specify the beat note value for tempo events by changing the Tempo Resolution. The beat note value selected for the Tempo Resolution is usually based on the meter. For example, in 4/4 the beat is a quarter note and in 6/8 the beat is (usually) a dotted-quarter note.
 
To select the Tempo Resolution (BPM rate) for Pencil tool edits, do one of the following:
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Click the Tempo Resolution selector and select the appropriate note value from the pop-up menu. The Tempo Resolution for tempo events created by drawing with the Pencil tool are set to the specified note value for the BPM rate.
– or – 
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Click the Tempo Resolution selector and select Follow Metronome Click. The Tempo Resolution for tempo events created by drawing with the Pencil tool automatically mirror the click values set by meter events in the Meter ruler.
A tempo curve can have different BPM values if there are meter click changes within the selected range.
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Because it can be unnecessarily complicated to set meter events separately for each Tempo event, selecting Follow Metronome Click is recommended in most cases.