To change a column’s setting in a list or document
library, go into the list or document library’s settings page by
switching to the List ribbon or Library ribbon and clicking the List
Settings or Library Settings button.
In the list or library
settings page, scroll down to the Columns section of the page. Here,
you see the list of all the columns that have been added to the list or
library. When
you click the title of the column you want to modify or remove from the
list or library, the settings page for that column appears. In this
page, you can either modify the column (rename it, change its settings,
or even change its type) or delete the column by using the Delete
button at the bottom of the page.
Note
Some columns cannot be
deleted, and the Delete button is not displayed for those columns.
These built-in columns are an integral part of SharePoint and cannot be
removed from lists and libraries.
Caution
Changing the
type of a column can have significant repercussions. You can lose data
if you move from one column type to another. For example, switching
from any type of column to a Choice column causes any value that
doesn’t exist in the choice list to be lost.
