Column types

Columns can be set up to contain certain types of data, like numbers or dates. Use the Column Type inspector or the contextual menu to set a column's type. Once a column's type is set, it will only accept data that fits that type. When changing the type of a column that already has data in it, OmniOutliner will do its best to convert the data to the new type.
Rich Text
Number
Pop-up List
Duration
Date
Checkbox