Auto completion feature helps the developer to get the list of options after typing the initial few characters automatically.
The number of Β characters after which the programmer starts getting the options automatically can be specified in Editor Options section of Edit/Style Options Tab in Tools > Preferences . This is referred to as automatic auto complete.

If the number of characters typed is less than this number, then to activate the auto completion behaviour, press Ctrl+Space . It displays the list of possible keywords in a list box depending on the current cursor context.

Similarly, auto completion feature is added for all the attribute values which accept constant keywords. This featureΒ is used in Tally.Developer 9 to work with the following contexts:
β Definitions
β System Definitions
β Attributes
β Modifier Location Keywords
β Attribute Keywords inside Modifier & Local
β Definition keywords inside local
β Attribute values which accept constant keywords