Figure 5-20. Pop-up field. 
  A pop-up field may also allow the user to enter a 
textual value in addition to the pre-defined values. 
Then the last option is named for example Other, 
and selecting it opens a data query. 
slider  With slider the user can adjust a numeric value 
(although it is not necessary to present the actual 
value to the user as a number). 
In view state, the item is presented as a textual 
item. 
In edit state, the value of a slider is immediately 
adjustable using the Scroll left and right keys.  
 
Figure 5-21. Slider field. 
 
List layouts 
List items can in general be more complex (contain more elements) than grid items. 
Certain layout rules apply to all lists: 
All items in a list have equal height on screen. (Forms do not follow this rule in 
edit state; see section Forms.) 
· 
·  The column structure of all items in a list must be similar. It is not possible to 
combine e.g. single-column items to a three-column item list. (But it is possible 
to use some different item types having the same general appearance.) See the 
following section about columns. 
 
 
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