If a list box has been configured, you will be able to open objects from the list of objects within an object. The following is an example:
To open an object from the list, double--click on it within the list.
Depending on the configuration of your system, you maybe be able buttons in the list box that allows you to Refresh the list box, create a new object with Create Object, or Delete objects in the list box.
You can delete multiple objects in a list box by pressing Ctrl on the keyboard while clicking on the objects you want to delete and then clicking Delete. To delete a consecutive list of objects, you can press Shift on the keyboard and select the first and then the last object you want to delete, then click Delete.