Click the application's control in the Front Panel.
Or:
From within Application Manager, double-click the application's icon.
From within File Manager, choose an action for a selected icon from the Selected menu.
From the Workspace Programs submenu, choose the item with the application name. See "Programs Submenu" for details.
You can also select an icon in a File Manager or Application Manager window by clicking it and then choose an action for the selected icon from the Selected menu.