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Create a new custom column with type 'Column built from other columns'. This kind of column is called a 'composite column'. When creating the column, you will see a box labeled Template. Put {formats} in that box. Press OK, press Apply, note that a restart is required, then restart calibre. Your column will now be there.
Note that you can change the template of a composite column by editing any cell in that column, making it easy to change what is shown.
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