You can change the format of data in a column. Each column style includes its own set of format options:
Changing data appearance in the Task Name column
Changing data appearance in the Duration column
Changing data appearance in the Start Date column
Changing data appearance in the End Date column
Changing data appearance in the Task Notes column
Changing data appearance in the Resources column
You can also change the units in the Timeline column.
See also
Changing column width
Changing column style
Changing the appearance of column text
Changing the appearance of column headings