Preselect or set a default value

[yogi4u]

What

I would like to know how I can preselect/prepopulate a value in autocomplete input text. If that is not possible is there any way to set a default value? HTML value="default" does not work.

Use case

I am trying to use it in an email composer's to, cc, bcc fields. By default the input fields have some default user selected, ( it may be different depending on case) but they can change it using the search in autocomplete.