Close Opportunity Dialog Box
Use the Close Opportunity dialog box to close an opportunity that you are no longer pursuing. Closing an opportunity does not delete it, but rather sets the opportunity status to inactive.
A closed opportunity appears greyed out in the opportunities lookups. As a result, you cannot edit any of the information related to it. Keep in mind that you can always reopen a closed opportunity (for example, if you decide to renew your pursuit of the contract or you want to edit some of the opportunity information). To open a closed opportunity, use the search field to find and select the opportunity, and click the Reopen option on the Actions menu.