Your current target displays in the System Tree using a bold font. The current target is the default target used in the New dialog box and for Run and Debug. The current target is set whenever you:
Invoke an action in the System Tree, Library painter, or main menu that affects a target or a child of a target , such as Build, Migrate, Run, or Debug. Some actions, such as Search and Migrate, display a dialog box. If you cancel the action by clicking the Cancel button in the dialog box, the current target is not changed.
Open an object painter or a file in a JSP target.
Change the active object painter.
If you prefer to set the current target explicitly using the Set as Current Target pop-up menu item for the target in the System Tree or the File>Set Current Target menu item, clear the Automatically Set Current Target check box on the Workspaces tab page in the System Options dialog box.