[MovedGoalPosts]

To create a drop down list you are using a "lookup list" for the data field. that can either be from another data table, or you can create a small list embedded in the properties of the field. Use of another table is more versatile and easily changed if your data values are likely to alter.

In the properties for the field simply set "limit to list = No" to enable stuff other than what is in the dropdown to be entered.