Most types of columns can be added without leaving your list or library.
- Navigate to the list or library you want to create a column in from the site contents of that site.
- Select + Add column or + to the right of the last column name at the top of the list or library.
- In the dropdown menu, choose the type of column you want.
- In the Create a column panel, type a title or column heading into the Name field.
- Enter any other required information. The number of fields will vary with column type you chose. The above example is for a choice field.
- Click 'Save'.
