Only
people who have Full Control or Design permissions can set up libraries to
require check-in/check-out of files.
To require check-in/check-out of files
11. Navigate to the
library you plan to work in. If the library name does not appear in the Quick
Launch pane, click All Site Content, and then select the name of
your library.
22. On the ribbon, in
the Library Tools group, click the Library tab.Click Library Settings.
43. On the Library
Settings page, under General Settings, click Versioning
settings.
54. In the Require
Check Out section, under the Require documents to be checked
out before they can be edited? Question, select Yes.
55. Click OK to
close the dialog box and return to the Library Settings page.