Assigning a List of Value to a attribute column in HEADERS table

 Hi,

I have a requirement to pick a plan element during creation of a transaction in 'Maintain Transactions" view. These transactions will not go under calculation, it is just for the reference. So I need to create a new field in the view which would have a list of values (plan elements) through which user would be allowed to pick a value. Please suggest, how we can assign a list of values to a field.

Tried assigning the list of values to the column, It is not picking the value (not able to assign the list of value to the column). Please suggest.