Custom fields witch search menus do not contain a drop down functionality for the menu values like in midtier.
The custom fields in smartit only provide type ahead feature and look like
and end users need to enter '%%%' to have all menu values displayed.
To enter '%%%' as wildcard search is not a commonly used technique to get menu values in web based applications while a drop down is commonly known.
The drop down feature exists for some out of the box fields like eg. Product Category
However this is implemented in core code and hence cannot be used for custom fields.
It would be great to have the same drop down functionality for custom fields with search menus available - even it would be restricted in some way (eg only 10 values displayed OOTB) to avoid performance issues.