BS: With the Script method you can format the drop-down after creation
item.[mycolumn].dropdown.script=modify={datawindow sysntax}
Best place to change the drop-down is the event drop-down, example for udf1 in dw_1
global function dw_1_item_udf1_dropdown
dw_1_item_udf_1.dropdown=script=...
end global
if you need additional script lines, you can execute this command for every line
scriptadd: add the script line
script : insert the script and replace existing. Node: Standard definition will be overwrite too
Example: column udf1: change color from dropdown column "stock"
item.udf1.dropdown.script=modify=stock.color="255"
Change to red, if stock < 1
item.udf1.dropdown.script=modify=stock.color="0~tif(stock<1,255,0)
It's allowed to work with place holder and line feeds
item.udf1.dropdown.scriptadd=insertrow=0<cr_lf>set=itemcode=abc
Best place to define the dropdown script is event
global function dw_x_item_fieldname_dropdown
Example
// field itemcode in dropdown is red
global function dw_1_item_udf1_dropdown
dw_1.item.udf1.dropdown.script.modify=itemcode.color="255"
end global
Find out the correct field name:
Open debug window
move mouse over the field in the drop-down list
Now you can see the field name in the first line in the debug window - in this case "batchattribute1"

Properties
Property  | 
Description  | 
modify=<dw script>  | 
modify the datawindow With this command you can change all datawindow properties from the drop-down list from type datawindow see datawindow 
 Example: change color from field batch. Use "red", if status not 0 
 global function dw_1_item_bin_from_dropdown 
 Syntax is always FieldName.Property="standard value ~t conditions" 
 if you want to change more then one condition, then use <cr_lf> ...scriptadd=modify=...<cr_lf>& 
  | 
set=field[row]=value  | 
modify a field set=ItemCode="hello"  | 
insertrow=<row>  | 
insert new row on this position. Set cursor on the new row Example: Insert in LUID field 2 additional lines: No and New 
 
 setvar=ls_script=deleteemptyrows<cr_lf>& dw_1.item.rfid.dropdown.script=<ls_script>  | 
deleterow=<row>  | 
delete this row  | 
deleteemptyrows  | 
delete all empty rows Check only first column. This column must be type "char"  | 
sort=<dw-syntax>  | 
sort the result  | 
filter=<dw-syntax>  | 
set filter  | 
title=<title text>  | 
replace title for this column  | 
format  | 
change format, name, field type of field Note: Only possible if the drop-down returns the result of BSL. For customization use the drop-down event. 
 // Example:  
 For all available properties see Format Properties  | 
setrow=<row>  | 
set cursor to this row  | 
sort=<dw-syntax>  | 
define datawindow sort Example: order by Batch descending dw_1.item.rfid.dropdown.scriptadd=sort=batch desc  | 
filter=<dw-syntax>  | 
define datawindow filter Example dw_1.item.bin_from.dropdown.scriptadd=filter=onhand - ReservedQuantity + ReservedQuantityforbom > 0 
  |