By default, the completion box is automatically displayed
whenever you pause for more than 500 milliseconds after typing a period.
To set the code completion delay to a different value:
Choose Tools Options.
Expand the Editor Settings node and select the Java or HTML Editor.
The Java or HTML Editor properties are displayed in the right pane of the
Options window.
Select the Delay of Completion Window property and set it to
the desired delay in milliseconds.