A frame is a control used, among other things, to set off certain controls
from the rest of the form. Each option button group, for example, needs its
own frame. If you have placed a frame on the form and controls in it, its
tab order is handled separately, as I described. You select a frame the way
you select any other control, by clicking on it.

If that's not what you're concerned about, then describe your layout in more
detail, especially what "drop-down menus" you're expecting to see in the tab
order.

If you put data in every field, then print the item, the resulting printout
should have the names of all the fields (probably including some that are
not available in the import data mapper -- you cannot map custom fields, for
example).

For the full "big picture," check the object browser: Press ALt+F11 to open
the VBA environment in Outlook, then press F2. Switch from <All Libraries>
to Outlook to browse all Outlook objects and their properties, methods, and
events. Select any object or member, then press F1 to see its Help topic.
Note that Outlook property names and display field names are not always
identical.