You can show or hide columns in a list or library as an alternative to deleting. When you hide a column, it doesn't affect the column or the data in the column, as it would if you deleted it. To reuse the column, you can just show it again.
Note: To show or hide a column in a list or library, you must at least be a member of the default Designers SharePoint group for the site.
Show or hide a column in a list or library
If the list or library is not already open, click its name on the page or in the Quick Launch.
If the name of your list or library does not appear on a page, click settings , click Site Contents, and then click the name of your list or library.
In the ribbon, click the List or Library tab.
In the Manage Views group, click Modify View.
In the Columns section, check or clear the box under the Display heading next to the column you want to show or hide.
Click OK to save.
To add a column to a list or library, see Create a column in a list or library.
To delete a column and its data from a list or library, see Delete a column from a list or library.
To change a column from a list or library, see Change a column in a list or library.
See Manage lists and libraries with many items for the steps to manage a list or library with many items.
See Add, change, or delete a list or library on a page for the steps to add, change, or delete a list or library from a page on a site.