Use the Style and Standard Editor dialog box to edit a balloon style.
Select Manage tab Styles and Standards panel
Styles Editor to open the Style and Standard Editor dialog box.
Expand the Balloon node in the browser, and select a balloon style to edit.
In the Balloon Style window, in the Substyles box, set the referenced leader and text styles to use in balloons.
In Balloon Formatting window, set the balloon shape, properties to display, and symbol size.
To use a sketch symbol as the default balloon shape, click Used-Defined Symbol, and select a sketch symbol from the list.
Set default offset spacing, if desired.
Add a comment, if appropriate.
Click Save to save the edits.
Click Done to close the Style and Standard Editor.