To edit callout text attributes

1. Select the callout you want to change.

2. On the callout ribbon, click the Fonts button on the callout ribbon to open the Object Format dialog box at the Text page.

Use the Object Format dialog box to change the font, text color and background color (this also changes the halo color), and other attributes. See "Using Fonts" for more information.

You can also click the Text Tool and use its ribbon to change the text attributes.