The Auto-complete branch under Configuration - IDE - IntelliTips has the following options related to auto-complete in UEStudio:
Show symbol list automatically
If this option is selected the auto-complete box (including symbols) will be displayed automatically after the specified number of characters have been saved.
Insert smart space after completed word
If this option is selected a space will be inserted automatically after the accepted word is inserted.
Auto-complete one-symbol list
If this option is selected and the auto-complete list contains only one unique item which matches the criteria specified for typed characters, then the item from the auto-complete list will automatically be inserted without prompting the user.
Delete "trailing" chars on auto-complete
If this option is selected and an auto-complete string is immediately followed by a non-matching string, the non-matching string will be deleted from the active document when the auto-completed word is selected. For example ("|" represents cursor) the user is typing:
ThisIs|Enum
and presses Enter, the auto-complete function would update the string to ThisIsVariable and the Enum portion of the active string would be deleted.
Disable this feature for
If the users wishes, the settings selected above may be disabled for strings occurring within comment blocks or strings (as defined by the String Chars setting in the associated wordfile).
Complete with
Using this option users may choose if options presented in the auto-complete dialog may be accepted by pressing the TAB or ENTER keys. If both options are unchecked, a double-click will insert the auto-complete word.