The text shown if the multiselect is disabled. Note that this option is set to the empty string <code>''</code> by default, that is <code>nonSelectedText</code> is shown if the multiselect is disabled and no options are selected.
The dropdown can also be dropped up. Note that it is recommended to also set <code>maxHeight</code>. The plugin calculates the necessary height of the dropdown and takes the minimum of the calculated value and <code>maxHeight</code>.
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Note that this feature has been introduced in <ahref="https://github.com/davidstutz/bootstrap-multiselect/issues/594">#594</a> and is known to have issues depending on the environment.