It is set with the ringtone volume and can't be adjusted separately.
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That is correct, Ann154. The Moto Z Force sound settings have the ringer and notification are the same volume setting.
What exactly are you trying to do, FUNCITY1? If this helps, there is a way to silence the message alerts in the messaging app itself. Here is a link to the steps: http://spr.ly/6582DcR3C
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