The Script Editor, provides several ways to view scripting events for objects in your form, depending on the type of object or objects you select, and the quantity of events you want to display.
1.
The events appear in the script editing field of the Script Editor, separated by the reference syntax for each event. Note that certain events only apply to specific types of objects. When you select a script event, the script editing field of the Script Editor only displays valid instances of the event. For example, if you select a subform that contains a drop-down list and select the preOpen event, the Script editor displays a single entry representing the drop-down list. This is because the preOpen event only applies to drop-down lists. Alternatively, selecting the enter event displays two entries, one for the drop-down list and one for the subform.
Note:
The Show list denotes events that contain scripts using a trailing asterisk (*) after the name of the event. If an event contains a script, when you select the event from the Show list, the source appears in the script editing field of the Script Editor.
1.
See also 

To view scripting events and scripts