This way you have one leader for all three, and don't need three separate balloons for each part. You might be able to create a text note with a leader and use a space as the text.Position the leader of the note to connect to your balloon. Using this video you can add multi leader dimensions and multi leader notes in Creo Parametric drawing. This Creo Parametric tutorial shows how to rearrange BOM balloon quantities using the Split, Merge, and Redistribute commands. In 2021 SP01 I cannot attach a balloon to a part if it is in the exploded state. For all of you math lovers out there challenge yourself!