If you want to create your own multiple choice list, click "User's multi-choice list" from the drop-down list. Here's what the multi-choice list can do for you:
You can add your own choices to the list. For example, if the label for your new custom field is Color, you can add red, blue, and green to the multi-choice list.
When your users add or use the Color custom field on a form, they have to choose from the list you created.
If you select Allow users to enter their own text, they can add something that's not on the list. Their entry will not be saved to the list, though.
You can also sort the list alphabetically. Once sorted, the list cannot be unsorted.
You might want to add or delete choices on the list.
Open the list that contains the Name or Item you want to edit. It could be a Customer, Vendor, or Employee list or the Items list.
Edit the entry that contains the custom field you want to edit.
Click the Additional Info tab.
Click Define Fields.
In the What kind of data? column, find the line that says, "User's multi-choice list", then click the drop-down list.
Click Edit multi-choice list.
Add or delete entries, then click OK.
Click Custom Fields.