Hi,
If you have column of values, just paste them into field, then delete. If you have no free space for that, paste them under bottom record, confirm 'add X records', then remove these new records. During each pasted cell with new option, it automatically added to the field settings. 

If you have a list of comma-separated values, just paste it to a new created MultiLineText field

Turn it to linked field (to a new table), go to new table and get a column of values. You know what to do next )
p.s. afterwards, remove unnecessary table and field.