To Configure How Balloons Are Distributed (AutoCAD Mechanical Toolset)

At the Command prompt, enter AMOPTIONS.
In the Options dialog box, click the AM:Standards tab.
In the Standard Elements list, double-click Balloon. The BOM Settings dialog box appears.
In the Default style section, click . The Balloon Settings dialog box appears.
In the Horizontal spacing box, specify the horizontal distance to maintain when balloons are aligned automatically.
In the Vertical spacing box, specify the vertical distance to maintain when balloons are aligned automatically.
Click OK until all dialog boxes close.