I hope I can accurately describe what I am trying to accomplish.
I have a PDF with a dropdown box that has a long list of names in it.
I want the box to recognize what the user is typing and offer them the selections that match the characters they are typing.
For example, the box contains the following names:
When the user types "N", I want Nancy to be the option that populates the box.
When the user types "B", the first option they see will be Brandy. But if they type "B" "R" "I", I want the box to then show the name Brittney.
When the user types "R", I want Rebecca to populate the box. But if they type "R" "I", there would be no auto population and they could keep typing the name - for instance, Richard.
Does this make sense? I can't get it to recognize anything past the first alpha character typed. I just don't know what script could accomplish this.
A script can be used to filter the items in a drop-down, but it's much
easier to implement it if the filter is located in a separate field (a text
field), and not a part of the drop-down itself.
I'm not sure that I follow you with a separate field.
Dropdowns created in Acrobat simply don't work that way, but what does work is the items that begin with a particular letter are cycled through when that letter is pressed. So in your example, it would cycle through Margie, Melvin, and Monica when the M key is repeatedly pressed.