Select the  activity box layout 
 - Choose View, Activity Network, Activity Network Options.
 
 You can also click the Layout Options bar, then choose Activity Network, Activity Network Options.
 
- Click the Activity Box Template tab.
- Select an activity box layout from the list of predefined activity box layouts.
 
 The example activity box uses the selected box layout.
 
- To preview your changes, click Apply.
Tip
 - To copy the activity box layout from another activity layout, click Copy From, then select the layout whose activity box layout you want to copy, then click Open.