When merging records, often I would like an option to enter the data I want into a field, instead of choosing between the two records.  Or I need both pieces of information (allergies, or addresses)

Please add a blank column where I could enter the data in a field. 

For example I have a record that has 'Addilynn' as the first name and nick name in one record.  It has 'Addilynn (Addi)' in the other record in both first name and nick name.  I want to put 'Addilynn' as the first name and 'Addi' as the nickname.