I have very limited space on my form and I am confronted with the
following problem:- I have a very long list of items of which the user
should select one, none or multiple. This eliminates the usage of a
dropdown field.- List Boxes would be better for this task, but they
should display only the standard value "none" and expand like a dropdown
list and then accept multiple values.Is this possible, and if so: how? I
spend the last 90 minutes googling and am still clueless, any help is
appreciated...