Autocomplete Dropdown
Another feature of the autocomplete is the ability to display a dropdown of options that can be automatically completed.
If you press Ctrl + Space while your cursor is in the code window, a drop-down list will be displayed containing the names of all of the actions, constants and global variables. You can choose one of list items and then press Tab or Enter to automatically type it out for you.
Note: This dropdown cannot be accessed if your cursor is inside a set of quotes (a string).
The autocomplete dropdown is also available for completing action names after the category has been typed. For example, when you type a period after the word Video, the script editor recognizes what you've typed as the beginning of an action name, and presents you with a drop-down list of all the actions that begin with "Video." If you like, you can choose one of the actions from that list and then press either Tab or Enter to automatically type that word out for you. You don't have to use the drop- down list, though...you can continue typing the rest of the action yourself if you want.
Tip: Once you've typed something that the script editor recognizes as the name of an action, a little bit of Quick Help appears near the bottom of the window listing the names of the action's parameters and indicating what type of value is expected for each one.