1. On the Annotate tab, in the Annotations group, click Balloon Note. This is the way you can create custom balloons in cre parametric and you can use multiple symbols as a custom balloon in the same drawing.BOM balloons are circular callouts in an assembly drawing that show Bill of Materials information for each component of an assembly view. This Creo Parametric tutorial shows how to rearrange BOM balloon quantities using the Split, Merge, and Redistribute commands. This Creo Parametric tutorial shows how to create custom symbols for use as BOM Balloons in a 2D production drawing.