There is a Notations Window Option that you may check out called Triplet Resolution (swing). It is probably on as defined by the style. If you uncheck that box, you should have 4 divisions for each beat instead of 3. You can also specify manually the number of divisions in a beat in the Notation window by right clicking on the beat on the brown part above the staff. There you can specify the divisions for both treble and bass clefs.

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