There are three types of list items:
- Poplists
- Tlists
- Combo Boxes.
Poplists, which are the default
type. They restrict the user from selecting only from the list elements that
are displayed.
Tlist style list item appears as
a rectangular box, which displays a fixed number of values. When the Tlist
contains values that cannot be displayed (due to the displayable area of the
item), a vertical scroll bar appears, allowing the end user to view and select
undisplayed values.
A combo box is nearly identical to a
poplist in look and functionality except that it allows users to enter values
that are not defined on the list. A good rule of thumb is to limit the number
of values in a list item to 15. If the list grows much larger than 15, you
should consider using a List of Values object, LOVs.
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